tools/slub/slabinfo.c

   1 /*
   2  * Slabinfo: Tool to get reports about slabs
   3  *
   4  * (C) 2007 sgi, Christoph Lameter
   5  * (C) 2011 Linux Foundation, Christoph Lameter
   6  *
   7  * Compile with:
   8  *
   9  * gcc -o slabinfo slabinfo.c
  10  */
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <sys/types.h>
  14 #include <dirent.h>
  15 #include <strings.h>
  16 #include <string.h>
  17 #include <unistd.h>
  18 #include <stdarg.h>
  19 #include <getopt.h>
  20 #include <regex.h>
  21 #include <errno.h>
  22
  23 #define MAX_SLABS 500
  24 #define MAX_ALIASES 500
  25 #define MAX_NODES 1024
  26
  27 struct slabinfo {
  28         char *name;
  29         int alias;
  30         int refs;
  31         int aliases, align, cache_dma, cpu_slabs, destroy_by_rcu;
  32         int hwcache_align, object_size, objs_per_slab;
  33         int sanity_checks, slab_size, store_user, trace;
  34         int order, poison, reclaim_account, red_zone;
  35         unsigned long partial, objects, slabs, objects_partial, objects_total;
  36         unsigned long alloc_fastpath, alloc_slowpath;
  37         unsigned long free_fastpath, free_slowpath;
  38         unsigned long free_frozen, free_add_partial, free_remove_partial;
  39         unsigned long alloc_from_partial, alloc_slab, free_slab, alloc_refill;
  40         unsigned long cpuslab_flush, deactivate_full, deactivate_empty;
  41         unsigned long deactivate_to_head, deactivate_to_tail;
  42         unsigned long deactivate_remote_frees, order_fallback;
  43         unsigned long cmpxchg_double_cpu_fail, cmpxchg_double_fail;
  44         unsigned long alloc_node_mismatch, deactivate_bypass;
  45         int numa[MAX_NODES];
  46         int numa_partial[MAX_NODES];
  47 } slabinfo[MAX_SLABS];
  48
  49 struct aliasinfo {
  50         char *name;
  51         char *ref;
  52         struct slabinfo *slab;
  53 } aliasinfo[MAX_ALIASES];
  54
  55 int slabs = 0;
  56 int actual_slabs = 0;
  57 int aliases = 0;
  58 int alias_targets = 0;
  59 int highest_node = 0;
  60
  61 char buffer[4096];
  62
  63 int show_empty = 0;
  64 int show_report = 0;
  65 int show_alias = 0;
  66 int show_slab = 0;
  67 int skip_zero = 1;
  68 int show_numa = 0;
  69 int show_track = 0;
  70 int show_first_alias = 0;
  71 int validate = 0;
  72 int shrink = 0;
  73 int show_inverted = 0;
  74 int show_single_ref = 0;
  75 int show_totals = 0;
  76 int sort_size = 0;
  77 int sort_active = 0;
  78 int set_debug = 0;
  79 int show_ops = 0;
  80 int show_activity = 0;
  81
  82 /* Debug options */
  83 int sanity = 0;
  84 int redzone = 0;
  85 int poison = 0;
  86 int tracking = 0;
  87 int tracing = 0;
  88
  89 int page_size;
  90
  91 regex_t pattern;
  92
  93 static void fatal(const char *x, ...)
  94 {
  95         va_list ap;
  96
  97         va_start(ap, x);
  98         vfprintf(stderr, x, ap);
  99         va_end(ap);
 100         exit(EXIT_FAILURE);
 101 }
 102
 103 static void usage(void)
 104 {
 105         printf("slabinfo 4/15/2011. (c) 2007 sgi/(c) 2011 Linux Foundation.\n\n"
 106                 "slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
 107                 "-a|--aliases           Show aliases\n"
 108                 "-A|--activity          Most active slabs first\n"
 109                 "-d<options>|--debug=<options> Set/Clear Debug options\n"
 110                 "-D|--display-active    Switch line format to activity\n"
 111                 "-e|--empty             Show empty slabs\n"
 112                 "-f|--first-alias       Show first alias\n"
 113                 "-h|--help              Show usage information\n"
 114                 "-i|--inverted          Inverted list\n"
 115                 "-l|--slabs             Show slabs\n"
 116                 "-n|--numa              Show NUMA information\n"
 117                 "-o|--ops               Show kmem_cache_ops\n"
 118                 "-s|--shrink            Shrink slabs\n"
 119                 "-r|--report            Detailed report on single slabs\n"
 120                 "-S|--Size              Sort by size\n"
 121                 "-t|--tracking          Show alloc/free information\n"
 122                 "-T|--Totals            Show summary information\n"
 123                 "-v|--validate          Validate slabs\n"
 124                 "-z|--zero              Include empty slabs\n"
 125                 "-1|--1ref              Single reference\n"
 126                 "\nValid debug options (FZPUT may be combined)\n"
 127                 "a / A          Switch on all debug options (=FZUP)\n"
 128                 "-              Switch off all debug options\n"
 129                 "f / F          Sanity Checks (SLAB_DEBUG_FREE)\n"
 130                 "z / Z          Redzoning\n"
 131                 "p / P          Poisoning\n"
 132                 "u / U          Tracking\n"
 133                 "t / T          Tracing\n"
 134         );
 135 }
 136
 137 static unsigned long read_obj(const char *name)
 138 {
 139         FILE *f = fopen(name, "r");
 140
 141         if (!f)
 142                 buffer[0] = 0;
 143         else {
 144                 if (!fgets(buffer, sizeof(buffer), f))
 145                         buffer[0] = 0;
 146                 fclose(f);
 147                 if (buffer[strlen(buffer)] == '\n')
 148                         buffer[strlen(buffer)] = 0;
 149         }
 150         return strlen(buffer);
 151 }
 152
 153
 154 /*
 155  * Get the contents of an attribute
 156  */
 157 static unsigned long get_obj(const char *name)
 158 {
 159         if (!read_obj(name))
 160                 return 0;
 161
 162         return atol(buffer);
 163 }
 164
 165 static unsigned long get_obj_and_str(const char *name, char **x)
 166 {
 167         unsigned long result = 0;
 168         char *p;
 169
 170         *x = NULL;
 171
 172         if (!read_obj(name)) {
 173                 x = NULL;
 174                 return 0;
 175         }
 176         result = strtoul(buffer, &p, 10);
 177         while (*p == ' ')
 178                 p++;
 179         if (*p)
 180                 *x = strdup(p);
 181         return result;
 182 }
 183
 184 static void set_obj(struct slabinfo *s, const char *name, int n)
 185 {
 186         char x[100];
 187         FILE *f;
 188
 189         snprintf(x, 100, "%s/%s", s->name, name);
 190         f = fopen(x, "w");
 191         if (!f)
 192                 fatal("Cannot write to %s\n", x);
 193
 194         fprintf(f, "%d\n", n);
 195         fclose(f);
 196 }
 197
 198 static unsigned long read_slab_obj(struct slabinfo *s, const char *name)
 199 {
 200         char x[100];
 201         FILE *f;
 202         size_t l;
 203
 204         snprintf(x, 100, "%s/%s", s->name, name);
 205         f = fopen(x, "r");
 206         if (!f) {
 207                 buffer[0] = 0;
 208                 l = 0;
 209         } else {
 210                 l = fread(buffer, 1, sizeof(buffer), f);
 211                 buffer[l] = 0;
 212                 fclose(f);
 213         }
 214         return l;
 215 }
 216
 217
 218 /*
 219  * Put a size string together
 220  */
 221 static int store_size(char *buffer, unsigned long value)
 222 {
 223         unsigned long divisor = 1;
 224         char trailer = 0;
 225         int n;
 226
 227         if (value > 1000000000UL) {
 228                 divisor = 100000000UL;
 229                 trailer = 'G';
 230         } else if (value > 1000000UL) {
 231                 divisor = 100000UL;
 232                 trailer = 'M';
 233         } else if (value > 1000UL) {
 234                 divisor = 100;
 235                 trailer = 'K';
 236         }
 237
 238         value /= divisor;
 239         n = sprintf(buffer, "%ld",value);
 240         if (trailer) {
 241                 buffer[n] = trailer;
 242                 n++;
 243                 buffer[n] = 0;
 244         }
 245         if (divisor != 1) {
 246                 memmove(buffer + n - 2, buffer + n - 3, 4);
 247                 buffer[n-2] = '.';
 248                 n++;
 249         }
 250         return n;
 251 }
 252
 253 static void decode_numa_list(int *numa, char *t)
 254 {
 255         int node;
 256         int nr;
 257
 258         memset(numa, 0, MAX_NODES * sizeof(int));
 259
 260         if (!t)
 261                 return;
 262
 263         while (*t == 'N') {
 264                 t++;
 265                 node = strtoul(t, &t, 10);
 266                 if (*t == '=') {
 267                         t++;
 268                         nr = strtoul(t, &t, 10);
 269                         numa[node] = nr;
 270                         if (node > highest_node)
 271                                 highest_node = node;
 272                 }
 273                 while (*t == ' ')
 274                         t++;
 275         }
 276 }
 277
 278 static void slab_validate(struct slabinfo *s)
 279 {
 280         if (strcmp(s->name, "*") == 0)
 281                 return;
 282
 283         set_obj(s, "validate", 1);
 284 }
 285
 286 static void slab_shrink(struct slabinfo *s)
 287 {
 288         if (strcmp(s->name, "*") == 0)
 289                 return;
 290
 291         set_obj(s, "shrink", 1);
 292 }
 293
 294 int line = 0;
 295
 296 static void first_line(void)
 297 {
 298         if (show_activity)
 299                 printf("Name                   Objects      Alloc       Free   %%Fast Fallb O CmpX   UL\n");
 300         else
 301                 printf("Name                   Objects Objsize    Space "
 302                         "Slabs/Part/Cpu  O/S O %%Fr %%Ef Flg\n");
 303 }
 304
 305 /*
 306  * Find the shortest alias of a slab
 307  */
 308 static struct aliasinfo *find_one_alias(struct slabinfo *find)
 309 {
 310         struct aliasinfo *a;
 311         struct aliasinfo *best = NULL;
 312
 313         for(a = aliasinfo;a < aliasinfo + aliases; a++) {
 314                 if (a->slab == find &&
 315                         (!best || strlen(best->name) < strlen(a->name))) {
 316                                 best = a;
 317                                 if (strncmp(a->name,"kmall", 5) == 0)
 318                                         return best;
 319                         }
 320         }
 321         return best;
 322 }
 323
 324 static unsigned long slab_size(struct slabinfo *s)
 325 {
 326         return  s->slabs * (page_size << s->order);
 327 }
 328
 329 static unsigned long slab_activity(struct slabinfo *s)
 330 {
 331         return  s->alloc_fastpath + s->free_fastpath +
 332                 s->alloc_slowpath + s->free_slowpath;
 333 }
 334
 335 static void slab_numa(struct slabinfo *s, int mode)
 336 {
 337         int node;
 338
 339         if (strcmp(s->name, "*") == 0)
 340                 return;
 341
 342         if (!highest_node) {
 343                 printf("\n%s: No NUMA information available.\n", s->name);
 344                 return;
 345         }
 346
 347         if (skip_zero && !s->slabs)
 348                 return;
 349
 350         if (!line) {
 351                 printf("\n%-21s:", mode ? "NUMA nodes" : "Slab");
 352                 for(node = 0; node <= highest_node; node++)
 353                         printf(" %4d", node);
 354                 printf("\n----------------------");
 355                 for(node = 0; node <= highest_node; node++)
 356                         printf("-----");
 357                 printf("\n");
 358         }
 359         printf("%-21s ", mode ? "All slabs" : s->name);
 360         for(node = 0; node <= highest_node; node++) {
 361                 char b[20];
 362
 363                 store_size(b, s->numa[node]);
 364                 printf(" %4s", b);
 365         }
 366         printf("\n");
 367         if (mode) {
 368                 printf("%-21s ", "Partial slabs");
 369                 for(node = 0; node <= highest_node; node++) {
 370                         char b[20];
 371
 372                         store_size(b, s->numa_partial[node]);
 373                         printf(" %4s", b);
 374                 }
 375                 printf("\n");
 376         }
 377         line++;
 378 }
 379
 380 static void show_tracking(struct slabinfo *s)
 381 {
 382         printf("\n%s: Kernel object allocation\n", s->name);
 383         printf("-----------------------------------------------------------------------\n");
 384         if (read_slab_obj(s, "alloc_calls"))
 385                 printf("%s", buffer);
 386         else
 387                 printf("No Data\n");
 388
 389         printf("\n%s: Kernel object freeing\n", s->name);
 390         printf("------------------------------------------------------------------------\n");
 391         if (read_slab_obj(s, "free_calls"))
 392                 printf("%s", buffer);
 393         else
 394                 printf("No Data\n");
 395
 396 }
 397
 398 static void ops(struct slabinfo *s)
 399 {
 400         if (strcmp(s->name, "*") == 0)
 401                 return;
 402
 403         if (read_slab_obj(s, "ops")) {
 404                 printf("\n%s: kmem_cache operations\n", s->name);
 405                 printf("--------------------------------------------\n");
 406                 printf("%s", buffer);
 407         } else
 408                 printf("\n%s has no kmem_cache operations\n", s->name);
 409 }
 410
 411 static const char *onoff(int x)
 412 {
 413         if (x)
 414                 return "On ";
 415         return "Off";
 416 }
 417
 418 static void slab_stats(struct slabinfo *s)
 419 {
 420         unsigned long total_alloc;
 421         unsigned long total_free;
 422         unsigned long total;
 423
 424         if (!s->alloc_slab)
 425                 return;
 426
 427         total_alloc = s->alloc_fastpath + s->alloc_slowpath;
 428         total_free = s->free_fastpath + s->free_slowpath;
 429
 430         if (!total_alloc)
 431                 return;
 432
 433         printf("\n");
 434         printf("Slab Perf Counter       Alloc     Free %%Al %%Fr\n");
 435         printf("--------------------------------------------------\n");
 436         printf("Fastpath             %8lu %8lu %3lu %3lu\n",
 437                 s->alloc_fastpath, s->free_fastpath,
 438                 s->alloc_fastpath * 100 / total_alloc,
 439                 s->free_fastpath * 100 / total_free);
 440         printf("Slowpath             %8lu %8lu %3lu %3lu\n",
 441                 total_alloc - s->alloc_fastpath, s->free_slowpath,
 442                 (total_alloc - s->alloc_fastpath) * 100 / total_alloc,
 443                 s->free_slowpath * 100 / total_free);
 444         printf("Page Alloc           %8lu %8lu %3lu %3lu\n",
 445                 s->alloc_slab, s->free_slab,
 446                 s->alloc_slab * 100 / total_alloc,
 447                 s->free_slab * 100 / total_free);
 448         printf("Add partial          %8lu %8lu %3lu %3lu\n",
 449                 s->deactivate_to_head + s->deactivate_to_tail,
 450                 s->free_add_partial,
 451                 (s->deactivate_to_head + s->deactivate_to_tail) * 100 / total_alloc,
 452                 s->free_add_partial * 100 / total_free);
 453         printf("Remove partial       %8lu %8lu %3lu %3lu\n",
 454                 s->alloc_from_partial, s->free_remove_partial,
 455                 s->alloc_from_partial * 100 / total_alloc,
 456                 s->free_remove_partial * 100 / total_free);
 457
 458         printf("RemoteObj/SlabFrozen %8lu %8lu %3lu %3lu\n",
 459                 s->deactivate_remote_frees, s->free_frozen,
 460                 s->deactivate_remote_frees * 100 / total_alloc,
 461                 s->free_frozen * 100 / total_free);
 462
 463         printf("Total                %8lu %8lu\n\n", total_alloc, total_free);
 464
 465         if (s->cpuslab_flush)
 466                 printf("Flushes %8lu\n", s->cpuslab_flush);
 467
 468         total = s->deactivate_full + s->deactivate_empty +
 469                         s->deactivate_to_head + s->deactivate_to_tail + s->deactivate_bypass;
 470
 471         if (total) {
 472                 printf("\nSlab Deactivation             Ocurrences  %%\n");
 473                 printf("-------------------------------------------------\n");
 474                 printf("Slab full                     %7lu  %3lu%%\n",
 475                         s->deactivate_full, (s->deactivate_full * 100) / total);
 476                 printf("Slab empty                    %7lu  %3lu%%\n",
 477                         s->deactivate_empty, (s->deactivate_empty * 100) / total);
 478                 printf("Moved to head of partial list %7lu  %3lu%%\n",
 479                         s->deactivate_to_head, (s->deactivate_to_head * 100) / total);
 480                 printf("Moved to tail of partial list %7lu  %3lu%%\n",
 481                         s->deactivate_to_tail, (s->deactivate_to_tail * 100) / total);
 482                 printf("Deactivation bypass           %7lu  %3lu%%\n",
 483                         s->deactivate_bypass, (s->deactivate_bypass * 100) / total);
 484                 printf("Refilled from foreign frees   %7lu  %3lu%%\n",
 485                         s->alloc_refill, (s->alloc_refill * 100) / total);
 486                 printf("Node mismatch                 %7lu  %3lu%%\n",
 487                         s->alloc_node_mismatch, (s->alloc_node_mismatch * 100) / total);
 488         }
 489
 490         if (s->cmpxchg_double_fail || s->cmpxchg_double_cpu_fail)
 491                 printf("\nCmpxchg_double Looping\n------------------------\n");
 492                 printf("Locked Cmpxchg Double redos   %lu\nUnlocked Cmpxchg Double redos %lu\n",
 493                         s->cmpxchg_double_fail, s->cmpxchg_double_cpu_fail);
 494 }
 495
 496 static void report(struct slabinfo *s)
 497 {
 498         if (strcmp(s->name, "*") == 0)
 499                 return;
 500
 501         printf("\nSlabcache: %-20s  Aliases: %2d Order : %2d Objects: %lu\n",
 502                 s->name, s->aliases, s->order, s->objects);
 503         if (s->hwcache_align)
 504                 printf("** Hardware cacheline aligned\n");
 505         if (s->cache_dma)
 506                 printf("** Memory is allocated in a special DMA zone\n");
 507         if (s->destroy_by_rcu)
 508                 printf("** Slabs are destroyed via RCU\n");
 509         if (s->reclaim_account)
 510                 printf("** Reclaim accounting active\n");
 511
 512         printf("\nSizes (bytes)     Slabs              Debug                Memory\n");
 513         printf("------------------------------------------------------------------------\n");
 514         printf("Object : %7d  Total  : %7ld   Sanity Checks : %s  Total: %7ld\n",
 515                         s->object_size, s->slabs, onoff(s->sanity_checks),
 516                         s->slabs * (page_size << s->order));
 517         printf("SlabObj: %7d  Full   : %7ld   Redzoning     : %s  Used : %7ld\n",
 518                         s->slab_size, s->slabs - s->partial - s->cpu_slabs,
 519                         onoff(s->red_zone), s->objects * s->object_size);
 520         printf("SlabSiz: %7d  Partial: %7ld   Poisoning     : %s  Loss : %7ld\n",
 521                         page_size << s->order, s->partial, onoff(s->poison),
 522                         s->slabs * (page_size << s->order) - s->objects * s->object_size);
 523         printf("Loss   : %7d  CpuSlab: %7d   Tracking      : %s  Lalig: %7ld\n",
 524                         s->slab_size - s->object_size, s->cpu_slabs, onoff(s->store_user),
 525                         (s->slab_size - s->object_size) * s->objects);
 526         printf("Align  : %7d  Objects: %7d   Tracing       : %s  Lpadd: %7ld\n",
 527                         s->align, s->objs_per_slab, onoff(s->trace),
 528                         ((page_size << s->order) - s->objs_per_slab * s->slab_size) *
 529                         s->slabs);
 530
 531         ops(s);
 532         show_tracking(s);
 533         slab_numa(s, 1);
 534         slab_stats(s);
 535 }
 536
 537 static void slabcache(struct slabinfo *s)
 538 {
 539         char size_str[20];
 540         char dist_str[40];
 541         char flags[20];
 542         char *p = flags;
 543
 544         if (strcmp(s->name, "*") == 0)
 545                 return;
 546
 547         if (actual_slabs == 1) {
 548                 report(s);
 549                 return;
 550         }
 551
 552         if (skip_zero && !show_empty && !s->slabs)
 553                 return;
 554
 555         if (show_empty && s->slabs)
 556                 return;
 557
 558         store_size(size_str, slab_size(s));
 559         snprintf(dist_str, 40, "%lu/%lu/%d", s->slabs - s->cpu_slabs,
 560                                                 s->partial, s->cpu_slabs);
 561
 562         if (!line++)
 563                 first_line();
 564
 565         if (s->aliases)
 566                 *p++ = '*';
 567         if (s->cache_dma)
 568                 *p++ = 'd';
 569         if (s->hwcache_align)
 570                 *p++ = 'A';
 571         if (s->poison)
 572                 *p++ = 'P';
 573         if (s->reclaim_account)
 574                 *p++ = 'a';
 575         if (s->red_zone)
 576                 *p++ = 'Z';
 577         if (s->sanity_checks)
 578                 *p++ = 'F';
 579         if (s->store_user)
 580                 *p++ = 'U';
 581         if (s->trace)
 582                 *p++ = 'T';
 583
 584         *p = 0;
 585         if (show_activity) {
 586                 unsigned long total_alloc;
 587                 unsigned long total_free;
 588
 589                 total_alloc = s->alloc_fastpath + s->alloc_slowpath;
 590                 total_free = s->free_fastpath + s->free_slowpath;
 591
 592                 printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d %4ld %4ld\n",
 593                         s->name, s->objects,
 594                         total_alloc, total_free,
 595                         total_alloc ? (s->alloc_fastpath * 100 / total_alloc) : 0,
 596                         total_free ? (s->free_fastpath * 100 / total_free) : 0,
 597                         s->order_fallback, s->order, s->cmpxchg_double_fail,
 598                         s->cmpxchg_double_cpu_fail);
 599         }
 600         else
 601                 printf("%-21s %8ld %7d %8s %14s %4d %1d %3ld %3ld %s\n",
 602                         s->name, s->objects, s->object_size, size_str, dist_str,
 603                         s->objs_per_slab, s->order,
 604                         s->slabs ? (s->partial * 100) / s->slabs : 100,
 605                         s->slabs ? (s->objects * s->object_size * 100) /
 606                                 (s->slabs * (page_size << s->order)) : 100,
 607                         flags);
 608 }
 609
 610 /*
 611  * Analyze debug options. Return false if something is amiss.
 612  */
 613 static int debug_opt_scan(char *opt)
 614 {
 615         if (!opt || !opt[0] || strcmp(opt, "-") == 0)
 616                 return 1;
 617
 618         if (strcasecmp(opt, "a") == 0) {
 619                 sanity = 1;
 620                 poison = 1;
 621                 redzone = 1;
 622                 tracking = 1;
 623                 return 1;
 624         }
 625
 626         for ( ; *opt; opt++)
 627                 switch (*opt) {
 628                 case 'F' : case 'f':
 629                         if (sanity)
 630                                 return 0;
 631                         sanity = 1;
 632                         break;
 633                 case 'P' : case 'p':
 634                         if (poison)
 635                                 return 0;
 636                         poison = 1;
 637                         break;
 638
 639                 case 'Z' : case 'z':
 640                         if (redzone)
 641                                 return 0;
 642                         redzone = 1;
 643                         break;
 644
 645                 case 'U' : case 'u':
 646                         if (tracking)
 647                                 return 0;
 648                         tracking = 1;
 649                         break;
 650
 651                 case 'T' : case 't':
 652                         if (tracing)
 653                                 return 0;
 654                         tracing = 1;
 655                         break;
 656                 default:
 657                         return 0;
 658                 }
 659         return 1;
 660 }
 661
 662 static int slab_empty(struct slabinfo *s)
 663 {
 664         if (s->objects > 0)
 665                 return 0;
 666
 667         /*
 668          * We may still have slabs even if there are no objects. Shrinking will
 669          * remove them.
 670          */
 671         if (s->slabs != 0)
 672                 set_obj(s, "shrink", 1);
 673
 674         return 1;
 675 }
 676
 677 static void slab_debug(struct slabinfo *s)
 678 {
 679         if (strcmp(s->name, "*") == 0)
 680                 return;
 681
 682         if (sanity && !s->sanity_checks) {
 683                 set_obj(s, "sanity", 1);
 684         }
 685         if (!sanity && s->sanity_checks) {
 686                 if (slab_empty(s))
 687                         set_obj(s, "sanity", 0);
 688                 else
 689                         fprintf(stderr, "%s not empty cannot disable sanity checks\n", s->name);
 690         }
 691         if (redzone && !s->red_zone) {
 692                 if (slab_empty(s))
 693                         set_obj(s, "red_zone", 1);
 694                 else
 695                         fprintf(stderr, "%s not empty cannot enable redzoning\n", s->name);
 696         }
 697         if (!redzone && s->red_zone) {
 698                 if (slab_empty(s))
 699                         set_obj(s, "red_zone", 0);
 700                 else
 701                         fprintf(stderr, "%s not empty cannot disable redzoning\n", s->name);
 702         }
 703         if (poison && !s->poison) {
 704                 if (slab_empty(s))
 705                         set_obj(s, "poison", 1);
 706                 else
 707                         fprintf(stderr, "%s not empty cannot enable poisoning\n", s->name);
 708         }
 709         if (!poison && s->poison) {
 710                 if (slab_empty(s))
 711                         set_obj(s, "poison", 0);
 712                 else
 713                         fprintf(stderr, "%s not empty cannot disable poisoning\n", s->name);
 714         }
 715         if (tracking && !s->store_user) {
 716                 if (slab_empty(s))
 717                         set_obj(s, "store_user", 1);
 718                 else
 719                         fprintf(stderr, "%s not empty cannot enable tracking\n", s->name);
 720         }
 721         if (!tracking && s->store_user) {
 722                 if (slab_empty(s))
 723                         set_obj(s, "store_user", 0);
 724                 else
 725                         fprintf(stderr, "%s not empty cannot disable tracking\n", s->name);
 726         }
 727         if (tracing && !s->trace) {
 728                 if (slabs == 1)
 729                         set_obj(s, "trace", 1);
 730                 else
 731                         fprintf(stderr, "%s can only enable trace for one slab at a time\n", s->name);
 732         }
 733         if (!tracing && s->trace)
 734                 set_obj(s, "trace", 1);
 735 }
 736
 737 static void totals(void)
 738 {
 739         struct slabinfo *s;
 740
 741         int used_slabs = 0;
 742         char b1[20], b2[20], b3[20], b4[20];
 743         unsigned long long max = 1ULL << 63;
 744
 745         /* Object size */
 746         unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
 747
 748         /* Number of partial slabs in a slabcache */
 749         unsigned long long min_partial = max, max_partial = 0,
 750                                 avg_partial, total_partial = 0;
 751
 752         /* Number of slabs in a slab cache */
 753         unsigned long long min_slabs = max, max_slabs = 0,
 754                                 avg_slabs, total_slabs = 0;
 755
 756         /* Size of the whole slab */
 757         unsigned long long min_size = max, max_size = 0,
 758                                 avg_size, total_size = 0;
 759
 760         /* Bytes used for object storage in a slab */
 761         unsigned long long min_used = max, max_used = 0,
 762                                 avg_used, total_used = 0;
 763
 764         /* Waste: Bytes used for alignment and padding */
 765         unsigned long long min_waste = max, max_waste = 0,
 766                                 avg_waste, total_waste = 0;
 767         /* Number of objects in a slab */
 768         unsigned long long min_objects = max, max_objects = 0,
 769                                 avg_objects, total_objects = 0;
 770         /* Waste per object */
 771         unsigned long long min_objwaste = max,
 772                                 max_objwaste = 0, avg_objwaste,
 773                                 total_objwaste = 0;
 774
 775         /* Memory per object */
 776         unsigned long long min_memobj = max,
 777                                 max_memobj = 0, avg_memobj,
 778                                 total_objsize = 0;
 779
 780         /* Percentage of partial slabs per slab */
 781         unsigned long min_ppart = 100, max_ppart = 0,
 782                                 avg_ppart, total_ppart = 0;
 783
 784         /* Number of objects in partial slabs */
 785         unsigned long min_partobj = max, max_partobj = 0,
 786                                 avg_partobj, total_partobj = 0;
 787
 788         /* Percentage of partial objects of all objects in a slab */
 789         unsigned long min_ppartobj = 100, max_ppartobj = 0,
 790                                 avg_ppartobj, total_ppartobj = 0;
 791
 792
 793         for (s = slabinfo; s < slabinfo + slabs; s++) {
 794                 unsigned long long size;
 795                 unsigned long used;
 796                 unsigned long long wasted;
 797                 unsigned long long objwaste;
 798                 unsigned long percentage_partial_slabs;
 799                 unsigned long percentage_partial_objs;
 800
 801                 if (!s->slabs || !s->objects)
 802                         continue;
 803
 804                 used_slabs++;
 805
 806                 size = slab_size(s);
 807                 used = s->objects * s->object_size;
 808                 wasted = size - used;
 809                 objwaste = s->slab_size - s->object_size;
 810
 811                 percentage_partial_slabs = s->partial * 100 / s->slabs;
 812                 if (percentage_partial_slabs > 100)
 813                         percentage_partial_slabs = 100;
 814
 815                 percentage_partial_objs = s->objects_partial * 100
 816                                                         / s->objects;
 817
 818                 if (percentage_partial_objs > 100)
 819                         percentage_partial_objs = 100;
 820
 821                 if (s->object_size < min_objsize)
 822                         min_objsize = s->object_size;
 823                 if (s->partial < min_partial)
 824                         min_partial = s->partial;
 825                 if (s->slabs < min_slabs)
 826                         min_slabs = s->slabs;
 827                 if (size < min_size)
 828                         min_size = size;
 829                 if (wasted < min_waste)
 830                         min_waste = wasted;
 831                 if (objwaste < min_objwaste)
 832                         min_objwaste = objwaste;
 833                 if (s->objects < min_objects)
 834                         min_objects = s->objects;
 835                 if (used < min_used)
 836                         min_used = used;
 837                 if (s->objects_partial < min_partobj)
 838                         min_partobj = s->objects_partial;
 839                 if (percentage_partial_slabs < min_ppart)
 840                         min_ppart = percentage_partial_slabs;
 841                 if (percentage_partial_objs < min_ppartobj)
 842                         min_ppartobj = percentage_partial_objs;
 843                 if (s->slab_size < min_memobj)
 844                         min_memobj = s->slab_size;
 845
 846                 if (s->object_size > max_objsize)
 847                         max_objsize = s->object_size;
 848                 if (s->partial > max_partial)
 849                         max_partial = s->partial;
 850                 if (s->slabs > max_slabs)
 851                         max_slabs = s->slabs;
 852                 if (size > max_size)
 853                         max_size = size;
 854                 if (wasted > max_waste)
 855                         max_waste = wasted;
 856                 if (objwaste > max_objwaste)
 857                         max_objwaste = objwaste;
 858                 if (s->objects > max_objects)
 859                         max_objects = s->objects;
 860                 if (used > max_used)
 861                         max_used = used;
 862                 if (s->objects_partial > max_partobj)
 863                         max_partobj = s->objects_partial;
 864                 if (percentage_partial_slabs > max_ppart)
 865                         max_ppart = percentage_partial_slabs;
 866                 if (percentage_partial_objs > max_ppartobj)
 867                         max_ppartobj = percentage_partial_objs;
 868                 if (s->slab_size > max_memobj)
 869                         max_memobj = s->slab_size;
 870
 871                 total_partial += s->partial;
 872                 total_slabs += s->slabs;
 873                 total_size += size;
 874                 total_waste += wasted;
 875
 876                 total_objects += s->objects;
 877                 total_used += used;
 878                 total_partobj += s->objects_partial;
 879                 total_ppart += percentage_partial_slabs;
 880                 total_ppartobj += percentage_partial_objs;
 881
 882                 total_objwaste += s->objects * objwaste;
 883                 total_objsize += s->objects * s->slab_size;
 884         }
 885
 886         if (!total_objects) {
 887                 printf("No objects\n");
 888                 return;
 889         }
 890         if (!used_slabs) {
 891                 printf("No slabs\n");
 892                 return;
 893         }
 894
 895         /* Per slab averages */
 896         avg_partial = total_partial / used_slabs;
 897         avg_slabs = total_slabs / used_slabs;
 898         avg_size = total_size / used_slabs;
 899         avg_waste = total_waste / used_slabs;
 900
 901         avg_objects = total_objects / used_slabs;
 902         avg_used = total_used / used_slabs;
 903         avg_partobj = total_partobj / used_slabs;
 904         avg_ppart = total_ppart / used_slabs;
 905         avg_ppartobj = total_ppartobj / used_slabs;
 906
 907         /* Per object object sizes */
 908         avg_objsize = total_used / total_objects;
 909         avg_objwaste = total_objwaste / total_objects;
 910         avg_partobj = total_partobj * 100 / total_objects;
 911         avg_memobj = total_objsize / total_objects;
 912
 913         printf("Slabcache Totals\n");
 914         printf("----------------\n");
 915         printf("Slabcaches : %3d      Aliases  : %3d->%-3d Active: %3d\n",
 916                         slabs, aliases, alias_targets, used_slabs);
 917
 918         store_size(b1, total_size);store_size(b2, total_waste);
 919         store_size(b3, total_waste * 100 / total_used);
 920         printf("Memory used: %6s   # Loss   : %6s   MRatio:%6s%%\n", b1, b2, b3);
 921
 922         store_size(b1, total_objects);store_size(b2, total_partobj);
 923         store_size(b3, total_partobj * 100 / total_objects);
 924         printf("# Objects  : %6s   # PartObj: %6s   ORatio:%6s%%\n", b1, b2, b3);
 925
 926         printf("\n");
 927         printf("Per Cache    Average         Min         Max       Total\n");
 928         printf("---------------------------------------------------------\n");
 929
 930         store_size(b1, avg_objects);store_size(b2, min_objects);
 931         store_size(b3, max_objects);store_size(b4, total_objects);
 932         printf("#Objects  %10s  %10s  %10s  %10s\n",
 933                         b1,     b2,     b3,     b4);
 934
 935         store_size(b1, avg_slabs);store_size(b2, min_slabs);
 936         store_size(b3, max_slabs);store_size(b4, total_slabs);
 937         printf("#Slabs    %10s  %10s  %10s  %10s\n",
 938                         b1,     b2,     b3,     b4);
 939
 940         store_size(b1, avg_partial);store_size(b2, min_partial);
 941         store_size(b3, max_partial);store_size(b4, total_partial);
 942         printf("#PartSlab %10s  %10s  %10s  %10s\n",
 943                         b1,     b2,     b3,     b4);
 944         store_size(b1, avg_ppart);store_size(b2, min_ppart);
 945         store_size(b3, max_ppart);
 946         store_size(b4, total_partial * 100  / total_slabs);
 947         printf("%%PartSlab%10s%% %10s%% %10s%% %10s%%\n",
 948                         b1,     b2,     b3,     b4);
 949
 950         store_size(b1, avg_partobj);store_size(b2, min_partobj);
 951         store_size(b3, max_partobj);
 952         store_size(b4, total_partobj);
 953         printf("PartObjs  %10s  %10s  %10s  %10s\n",
 954                         b1,     b2,     b3,     b4);
 955
 956         store_size(b1, avg_ppartobj);store_size(b2, min_ppartobj);
 957         store_size(b3, max_ppartobj);
 958         store_size(b4, total_partobj * 100 / total_objects);
 959         printf("%% PartObj%10s%% %10s%% %10s%% %10s%%\n",
 960                         b1,     b2,     b3,     b4);
 961
 962         store_size(b1, avg_size);store_size(b2, min_size);
 963         store_size(b3, max_size);store_size(b4, total_size);
 964         printf("Memory    %10s  %10s  %10s  %10s\n",
 965                         b1,     b2,     b3,     b4);
 966
 967         store_size(b1, avg_used);store_size(b2, min_used);
 968         store_size(b3, max_used);store_size(b4, total_used);
 969         printf("Used      %10s  %10s  %10s  %10s\n",
 970                         b1,     b2,     b3,     b4);
 971
 972         store_size(b1, avg_waste);store_size(b2, min_waste);
 973         store_size(b3, max_waste);store_size(b4, total_waste);
 974         printf("Loss      %10s  %10s  %10s  %10s\n",
 975                         b1,     b2,     b3,     b4);
 976
 977         printf("\n");
 978         printf("Per Object   Average         Min         Max\n");
 979         printf("---------------------------------------------\n");
 980
 981         store_size(b1, avg_memobj);store_size(b2, min_memobj);
 982         store_size(b3, max_memobj);
 983         printf("Memory    %10s  %10s  %10s\n",
 984                         b1,     b2,     b3);
 985         store_size(b1, avg_objsize);store_size(b2, min_objsize);
 986         store_size(b3, max_objsize);
 987         printf("User      %10s  %10s  %10s\n",
 988                         b1,     b2,     b3);
 989
 990         store_size(b1, avg_objwaste);store_size(b2, min_objwaste);
 991         store_size(b3, max_objwaste);
 992         printf("Loss      %10s  %10s  %10s\n",
 993                         b1,     b2,     b3);
 994 }
 995
 996 static void sort_slabs(void)
 997 {
 998         struct slabinfo *s1,*s2;
 999
1000         for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) {
1001                 for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
1002                         int result;
1003
1004                         if (sort_size)
1005                                 result = slab_size(s1) < slab_size(s2);
1006                         else if (sort_active)
1007                                 result = slab_activity(s1) < slab_activity(s2);
1008                         else
1009                                 result = strcasecmp(s1->name, s2->name);
1010
1011                         if (show_inverted)
1012                                 result = -result;
1013
1014                         if (result > 0) {
1015                                 struct slabinfo t;
1016
1017                                 memcpy(&t, s1, sizeof(struct slabinfo));
1018                                 memcpy(s1, s2, sizeof(struct slabinfo));
1019                                 memcpy(s2, &t, sizeof(struct slabinfo));
1020                         }
1021                 }
1022         }
1023 }
1024
1025 static void sort_aliases(void)
1026 {
1027         struct aliasinfo *a1,*a2;
1028
1029         for (a1 = aliasinfo; a1 < aliasinfo + aliases; a1++) {
1030                 for (a2 = a1 + 1; a2 < aliasinfo + aliases; a2++) {
1031                         char *n1, *n2;
1032
1033                         n1 = a1->name;
1034                         n2 = a2->name;
1035                         if (show_alias && !show_inverted) {
1036                                 n1 = a1->ref;
1037                                 n2 = a2->ref;
1038                         }
1039                         if (strcasecmp(n1, n2) > 0) {
1040                                 struct aliasinfo t;
1041
1042                                 memcpy(&t, a1, sizeof(struct aliasinfo));
1043                                 memcpy(a1, a2, sizeof(struct aliasinfo));
1044                                 memcpy(a2, &t, sizeof(struct aliasinfo));
1045                         }
1046                 }
1047         }
1048 }
1049
1050 static void link_slabs(void)
1051 {
1052         struct aliasinfo *a;
1053         struct slabinfo *s;
1054
1055         for (a = aliasinfo; a < aliasinfo + aliases; a++) {
1056
1057                 for (s = slabinfo; s < slabinfo + slabs; s++)
1058                         if (strcmp(a->ref, s->name) == 0) {
1059                                 a->slab = s;
1060                                 s->refs++;
1061                                 break;
1062                         }
1063                 if (s == slabinfo + slabs)
1064                         fatal("Unresolved alias %s\n", a->ref);
1065         }
1066 }
1067
1068 static void alias(void)
1069 {
1070         struct aliasinfo *a;
1071         char *active = NULL;
1072
1073         sort_aliases();
1074         link_slabs();
1075
1076         for(a = aliasinfo; a < aliasinfo + aliases; a++) {
1077
1078                 if (!show_single_ref && a->slab->refs == 1)
1079                         continue;
1080
1081                 if (!show_inverted) {
1082                         if (active) {
1083                                 if (strcmp(a->slab->name, active) == 0) {
1084                                         printf(" %s", a->name);
1085                                         continue;
1086                                 }
1087                         }
1088                         printf("\n%-12s <- %s", a->slab->name, a->name);
1089                         active = a->slab->name;
1090                 }
1091                 else
1092                         printf("%-20s -> %s\n", a->name, a->slab->name);
1093         }
1094         if (active)
1095                 printf("\n");
1096 }
1097
1098
1099 static void rename_slabs(void)
1100 {
1101         struct slabinfo *s;
1102         struct aliasinfo *a;
1103
1104         for (s = slabinfo; s < slabinfo + slabs; s++) {
1105                 if (*s->name != ':')
1106                         continue;
1107
1108                 if (s->refs > 1 && !show_first_alias)
1109                         continue;
1110
1111                 a = find_one_alias(s);
1112
1113                 if (a)
1114                         s->name = a->name;
1115                 else {
1116                         s->name = "*";
1117                         actual_slabs--;
1118                 }
1119         }
1120 }
1121
1122 static int slab_mismatch(char *slab)
1123 {
1124         return regexec(&pattern, slab, 0, NULL, 0);
1125 }
1126
1127 static void read_slab_dir(void)
1128 {
1129         DIR *dir;
1130         struct dirent *de;
1131         struct slabinfo *slab = slabinfo;
1132         struct aliasinfo *alias = aliasinfo;
1133         char *p;
1134         char *t;
1135         int count;
1136
1137         if (chdir("/sys/kernel/slab") && chdir("/sys/slab"))
1138                 fatal("SYSFS support for SLUB not active\n");
1139
1140         dir = opendir(".");
1141         while ((de = readdir(dir))) {
1142                 if (de->d_name[0] == '.' ||
1143                         (de->d_name[0] != ':' && slab_mismatch(de->d_name)))
1144                                 continue;
1145                 switch (de->d_type) {
1146                    case DT_LNK:
1147                         alias->name = strdup(de->d_name);
1148                         count = readlink(de->d_name, buffer, sizeof(buffer));
1149
1150                         if (count < 0)
1151                                 fatal("Cannot read symlink %s\n", de->d_name);
1152
1153                         buffer[count] = 0;
1154                         p = buffer + count;
1155                         while (p > buffer && p[-1] != '/')
1156                                 p--;
1157                         alias->ref = strdup(p);
1158                         alias++;
1159                         break;
1160                    case DT_DIR:
1161                         if (chdir(de->d_name))
1162                                 fatal("Unable to access slab %s\n", slab->name);
1163                         slab->name = strdup(de->d_name);
1164                         slab->alias = 0;
1165                         slab->refs = 0;
1166                         slab->aliases = get_obj("aliases");
1167                         slab->align = get_obj("align");
1168                         slab->cache_dma = get_obj("cache_dma");
1169                         slab->cpu_slabs = get_obj("cpu_slabs");
1170                         slab->destroy_by_rcu = get_obj("destroy_by_rcu");
1171                         slab->hwcache_align = get_obj("hwcache_align");
1172                         slab->object_size = get_obj("object_size");
1173                         slab->objects = get_obj("objects");
1174                         slab->objects_partial = get_obj("objects_partial");
1175                         slab->objects_total = get_obj("objects_total");
1176                         slab->objs_per_slab = get_obj("objs_per_slab");
1177                         slab->order = get_obj("order");
1178                         slab->partial = get_obj("partial");
1179                         slab->partial = get_obj_and_str("partial", &t);
1180                         decode_numa_list(slab->numa_partial, t);
1181                         free(t);
1182                         slab->poison = get_obj("poison");
1183                         slab->reclaim_account = get_obj("reclaim_account");
1184                         slab->red_zone = get_obj("red_zone");
1185                         slab->sanity_checks = get_obj("sanity_checks");
1186                         slab->slab_size = get_obj("slab_size");
1187                         slab->slabs = get_obj_and_str("slabs", &t);
1188                         decode_numa_list(slab->numa, t);
1189                         free(t);
1190                         slab->store_user = get_obj("store_user");
1191                         slab->trace = get_obj("trace");
1192                         slab->alloc_fastpath = get_obj("alloc_fastpath");
1193                         slab->alloc_slowpath = get_obj("alloc_slowpath");
1194                         slab->free_fastpath = get_obj("free_fastpath");
1195                         slab->free_slowpath = get_obj("free_slowpath");
1196                         slab->free_frozen= get_obj("free_frozen");
1197                         slab->free_add_partial = get_obj("free_add_partial");
1198                         slab->free_remove_partial = get_obj("free_remove_partial");
1199                         slab->alloc_from_partial = get_obj("alloc_from_partial");
1200                         slab->alloc_slab = get_obj("alloc_slab");
1201                         slab->alloc_refill = get_obj("alloc_refill");
1202                         slab->free_slab = get_obj("free_slab");
1203                         slab->cpuslab_flush = get_obj("cpuslab_flush");
1204                         slab->deactivate_full = get_obj("deactivate_full");
1205                         slab->deactivate_empty = get_obj("deactivate_empty");
1206                         slab->deactivate_to_head = get_obj("deactivate_to_head");
1207                         slab->deactivate_to_tail = get_obj("deactivate_to_tail");
1208                         slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
1209                         slab->order_fallback = get_obj("order_fallback");
1210                         slab->cmpxchg_double_cpu_fail = get_obj("cmpxchg_double_cpu_fail");
1211                         slab->cmpxchg_double_fail = get_obj("cmpxchg_double_fail");
1212                         slab->alloc_node_mismatch = get_obj("alloc_node_mismatch");
1213                         slab->deactivate_bypass = get_obj("deactivate_bypass");
1214                         chdir("..");
1215                         if (slab->name[0] == ':')
1216                                 alias_targets++;
1217                         slab++;
1218                         break;
1219                    default :
1220                         fatal("Unknown file type %lx\n", de->d_type);
1221                 }
1222         }
1223         closedir(dir);
1224         slabs = slab - slabinfo;
1225         actual_slabs = slabs;
1226         aliases = alias - aliasinfo;
1227         if (slabs > MAX_SLABS)
1228                 fatal("Too many slabs\n");
1229         if (aliases > MAX_ALIASES)
1230                 fatal("Too many aliases\n");
1231 }
1232
1233 static void output_slabs(void)
1234 {
1235         struct slabinfo *slab;
1236
1237         for (slab = slabinfo; slab < slabinfo + slabs; slab++) {
1238
1239                 if (slab->alias)
1240                         continue;
1241
1242
1243                 if (show_numa)
1244                         slab_numa(slab, 0);
1245                 else if (show_track)
1246                         show_tracking(slab);
1247                 else if (validate)
1248                         slab_validate(slab);
1249                 else if (shrink)
1250                         slab_shrink(slab);
1251                 else if (set_debug)
1252                         slab_debug(slab);
1253                 else if (show_ops)
1254                         ops(slab);
1255                 else if (show_slab)
1256                         slabcache(slab);
1257                 else if (show_report)
1258                         report(slab);
1259         }
1260 }
1261
1262 struct option opts[] = {
1263         { "aliases", 0, NULL, 'a' },
1264         { "activity", 0, NULL, 'A' },
1265         { "debug", 2, NULL, 'd' },
1266         { "display-activity", 0, NULL, 'D' },
1267         { "empty", 0, NULL, 'e' },
1268         { "first-alias", 0, NULL, 'f' },
1269         { "help", 0, NULL, 'h' },
1270         { "inverted", 0, NULL, 'i'},
1271         { "numa", 0, NULL, 'n' },
1272         { "ops", 0, NULL, 'o' },
1273         { "report", 0, NULL, 'r' },
1274         { "shrink", 0, NULL, 's' },
1275         { "slabs", 0, NULL, 'l' },
1276         { "track", 0, NULL, 't'},
1277         { "validate", 0, NULL, 'v' },
1278         { "zero", 0, NULL, 'z' },
1279         { "1ref", 0, NULL, '1'},
1280         { NULL, 0, NULL, 0 }
1281 };
1282
1283 int main(int argc, char *argv[])
1284 {
1285         int c;
1286         int err;
1287         char *pattern_source;
1288
1289         page_size = getpagesize();
1290
1291         while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTS",
1292                                                 opts, NULL)) != -1)
1293                 switch (c) {
1294                 case '1':
1295                         show_single_ref = 1;
1296                         break;
1297                 case 'a':
1298                         show_alias = 1;
1299                         break;
1300                 case 'A':
1301                         sort_active = 1;
1302                         break;
1303                 case 'd':
1304                         set_debug = 1;
1305                         if (!debug_opt_scan(optarg))
1306                                 fatal("Invalid debug option '%s'\n", optarg);
1307                         break;
1308                 case 'D':
1309                         show_activity = 1;
1310                         break;
1311                 case 'e':
1312                         show_empty = 1;
1313                         break;
1314                 case 'f':
1315                         show_first_alias = 1;
1316                         break;
1317                 case 'h':
1318                         usage();
1319                         return 0;
1320                 case 'i':
1321                         show_inverted = 1;
1322                         break;
1323                 case 'n':
1324                         show_numa = 1;
1325                         break;
1326                 case 'o':
1327                         show_ops = 1;
1328                         break;
1329                 case 'r':
1330                         show_report = 1;
1331                         break;
1332                 case 's':
1333                         shrink = 1;
1334                         break;
1335                 case 'l':
1336                         show_slab = 1;
1337                         break;
1338                 case 't':
1339                         show_track = 1;
1340                         break;
1341                 case 'v':
1342                         validate = 1;
1343                         break;
1344                 case 'z':
1345                         skip_zero = 0;
1346                         break;
1347                 case 'T':
1348                         show_totals = 1;
1349                         break;
1350                 case 'S':
1351                         sort_size = 1;
1352                         break;
1353
1354                 default:
1355                         fatal("%s: Invalid option '%c'\n", argv[0], optopt);
1356
1357         }
1358
1359         if (!show_slab && !show_alias && !show_track && !show_report
1360                 && !validate && !shrink && !set_debug && !show_ops)
1361                         show_slab = 1;
1362
1363         if (argc > optind)
1364                 pattern_source = argv[optind];
1365         else
1366                 pattern_source = ".*";
1367
1368         err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
1369         if (err)
1370                 fatal("%s: Invalid pattern '%s' code %d\n",
1371                         argv[0], pattern_source, err);
1372         read_slab_dir();
1373         if (show_alias)
1374                 alias();
1375         else
1376         if (show_totals)
1377                 totals();
1378         else {
1379                 link_slabs();
1380                 rename_slabs();
1381                 sort_slabs();
1382                 output_slabs();
1383         }
1384         return 0;
1385 }