__u32 imp_msg_magic;
__u32 imp_msghdr_flags; /* adjusted based on server capability */
- struct ptlrpc_request_pool *imp_rq_pool; /* emergency request pool */
-
struct imp_at imp_at; /* adaptive timeout data */
time_t imp_last_reply_time; /* for health check */
};
/** Maximum message size that would fit into a request from this pool */
int prp_rq_size;
/** Function to allocate more requests for this pool */
- void (*prp_populate)(struct ptlrpc_request_pool *, int);
+ int (*prp_populate)(struct ptlrpc_request_pool *, int);
};
struct lu_context;
struct ptlrpc_request *req);
void ptlrpc_free_rq_pool(struct ptlrpc_request_pool *pool);
-void ptlrpc_add_rqs_to_pool(struct ptlrpc_request_pool *pool, int num_rq);
+int ptlrpc_add_rqs_to_pool(struct ptlrpc_request_pool *pool, int num_rq);
struct ptlrpc_request_pool *
ptlrpc_init_rq_pool(int, int,
- void (*populate_pool)(struct ptlrpc_request_pool *, int));
+ int (*populate_pool)(struct ptlrpc_request_pool *, int));
void ptlrpc_at_set_req_timeout(struct ptlrpc_request *req);
struct ptlrpc_request *ptlrpc_request_alloc(struct obd_import *imp,
/* ptlrpc/llog_client.c */
extern struct llog_operations llog_client_ops;
-
/** @} net */
#endif
CDEBUG(D_CONFIG, "%s: client import never connected\n",
obd->obd_name);
ptlrpc_invalidate_import(imp);
- if (imp->imp_rq_pool) {
- ptlrpc_free_rq_pool(imp->imp_rq_pool);
- imp->imp_rq_pool = NULL;
- }
client_destroy_import(imp);
obd->u.cli.cl_import = NULL;
}
static void obd_zombie_import_add(struct obd_import *imp)
{
LASSERT(!imp->imp_sec);
- LASSERT(!imp->imp_rq_pool);
spin_lock(&obd_zombie_impexp_lock);
LASSERT(list_empty(&imp->imp_zombie_chain));
zombies_count++;
struct obd_device *dev = container_of(kobj, struct obd_device,
obd_kobj);
struct client_obd *cli = &dev->u.cli;
- struct ptlrpc_request_pool *pool = cli->cl_import->imp_rq_pool;
int rc;
unsigned long val;
+ int adding, added, req_count;
rc = kstrtoul(buffer, 10, &val);
if (rc)
if (val < 1 || val > OSC_MAX_RIF_MAX)
return -ERANGE;
- if (pool && val > cli->cl_max_rpcs_in_flight)
- pool->prp_populate(pool, val-cli->cl_max_rpcs_in_flight);
+ adding = val - cli->cl_max_rpcs_in_flight;
+ req_count = atomic_read(&osc_pool_req_count);
+ if (adding > 0 && req_count < osc_reqpool_maxreqcount) {
+ /*
+ * There might be some race which will cause over-limit
+ * allocation, but it is fine.
+ */
+ if (req_count + adding > osc_reqpool_maxreqcount)
+ adding = osc_reqpool_maxreqcount - req_count;
+
+ added = osc_rq_pool->prp_populate(osc_rq_pool, adding);
+ atomic_add(added, &osc_pool_req_count);
+ }
client_obd_list_lock(&cli->cl_loi_list_lock);
cli->cl_max_rpcs_in_flight = val;
#define OAP_MAGIC 8675309
+extern atomic_t osc_pool_req_count;
+extern unsigned int osc_reqpool_maxreqcount;
+extern struct ptlrpc_request_pool *osc_rq_pool;
+
struct lu_env;
enum async_flags {
#include "../include/lustre_param.h"
#include "../include/lustre_fid.h"
#include "../include/obd_class.h"
+#include "../include/obd.h"
#include "osc_internal.h"
#include "osc_cl_internal.h"
+atomic_t osc_pool_req_count;
+unsigned int osc_reqpool_maxreqcount;
+struct ptlrpc_request_pool *osc_rq_pool;
+
+/* max memory used for request pool, unit is MB */
+static unsigned int osc_reqpool_mem_max = 5;
+module_param(osc_reqpool_mem_max, uint, 0444);
+
struct osc_brw_async_args {
struct obdo *aa_oa;
int aa_requested_nob;
if ((cmd & OBD_BRW_WRITE) != 0) {
opc = OST_WRITE;
req = ptlrpc_request_alloc_pool(cli->cl_import,
- cli->cl_import->imp_rq_pool,
+ osc_rq_pool,
&RQF_OST_BRW_WRITE);
} else {
opc = OST_READ;
struct client_obd *cli = &obd->u.cli;
void *handler;
int rc;
+ int adding;
+ int added;
+ int req_count;
rc = ptlrpcd_addref();
if (rc)
ptlrpc_lprocfs_register_obd(obd);
}
- /* We need to allocate a few requests more, because
- * brw_interpret tries to create new requests before freeing
- * previous ones, Ideally we want to have 2x max_rpcs_in_flight
- * reserved, but I'm afraid that might be too much wasted RAM
- * in fact, so 2 is just my guess and still should work. */
- cli->cl_import->imp_rq_pool =
- ptlrpc_init_rq_pool(cli->cl_max_rpcs_in_flight + 2,
- OST_MAXREQSIZE,
- ptlrpc_add_rqs_to_pool);
+ /*
+ * We try to control the total number of requests with a upper limit
+ * osc_reqpool_maxreqcount. There might be some race which will cause
+ * over-limit allocation, but it is fine.
+ */
+ req_count = atomic_read(&osc_pool_req_count);
+ if (req_count < osc_reqpool_maxreqcount) {
+ adding = cli->cl_max_rpcs_in_flight + 2;
+ if (req_count + adding > osc_reqpool_maxreqcount)
+ adding = osc_reqpool_maxreqcount - req_count;
+
+ added = ptlrpc_add_rqs_to_pool(osc_rq_pool, adding);
+ atomic_add(added, &osc_pool_req_count);
+ }
INIT_LIST_HEAD(&cli->cl_grant_shrink_list);
ns_register_cancel(obd->obd_namespace, osc_cancel_for_recovery);
static int __init osc_init(void)
{
struct lprocfs_static_vars lvars = { NULL };
+ unsigned int reqpool_size;
+ unsigned int reqsize;
int rc;
/* print an address of _any_ initialized kernel symbol from this
rc = class_register_type(&osc_obd_ops, NULL,
LUSTRE_OSC_NAME, &osc_device_type);
- if (rc) {
- lu_kmem_fini(osc_caches);
- return rc;
- }
+ if (rc)
+ goto out_kmem;
spin_lock_init(&osc_ast_guard);
lockdep_set_class(&osc_ast_guard, &osc_ast_guard_class);
+ /* This is obviously too much memory, only prevent overflow here */
+ if (osc_reqpool_mem_max >= 1 << 12 || osc_reqpool_mem_max == 0) {
+ rc = -EINVAL;
+ goto out_type;
+ }
+
+ reqpool_size = osc_reqpool_mem_max << 20;
+
+ reqsize = 1;
+ while (reqsize < OST_MAXREQSIZE)
+ reqsize = reqsize << 1;
+
+ /*
+ * We don't enlarge the request count in OSC pool according to
+ * cl_max_rpcs_in_flight. The allocation from the pool will only be
+ * tried after normal allocation failed. So a small OSC pool won't
+ * cause much performance degression in most of cases.
+ */
+ osc_reqpool_maxreqcount = reqpool_size / reqsize;
+
+ atomic_set(&osc_pool_req_count, 0);
+ osc_rq_pool = ptlrpc_init_rq_pool(0, OST_MAXREQSIZE,
+ ptlrpc_add_rqs_to_pool);
+
+ if (osc_rq_pool)
+ return 0;
+
+ rc = -ENOMEM;
+
+out_type:
+ class_unregister_type(LUSTRE_OSC_NAME);
+out_kmem:
+ lu_kmem_fini(osc_caches);
return rc;
}
{
class_unregister_type(LUSTRE_OSC_NAME);
lu_kmem_fini(osc_caches);
+ ptlrpc_free_rq_pool(osc_rq_pool);
}
MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
/**
* Allocates, initializes and adds \a num_rq requests to the pool \a pool
*/
-void ptlrpc_add_rqs_to_pool(struct ptlrpc_request_pool *pool, int num_rq)
+int ptlrpc_add_rqs_to_pool(struct ptlrpc_request_pool *pool, int num_rq)
{
int i;
int size = 1;
spin_unlock(&pool->prp_lock);
req = ptlrpc_request_cache_alloc(GFP_NOFS);
if (!req)
- return;
+ return i;
msg = libcfs_kvzalloc(size, GFP_NOFS);
if (!msg) {
ptlrpc_request_cache_free(req);
- return;
+ return i;
}
req->rq_reqbuf = msg;
req->rq_reqbuf_len = size;
list_add_tail(&req->rq_list, &pool->prp_req_list);
}
spin_unlock(&pool->prp_lock);
+ return num_rq;
}
EXPORT_SYMBOL(ptlrpc_add_rqs_to_pool);
*/
struct ptlrpc_request_pool *
ptlrpc_init_rq_pool(int num_rq, int msgsize,
- void (*populate_pool)(struct ptlrpc_request_pool *, int))
+ int (*populate_pool)(struct ptlrpc_request_pool *, int))
{
struct ptlrpc_request_pool *pool;
populate_pool(pool, num_rq);
- if (list_empty(&pool->prp_req_list)) {
- /* have not allocated a single request for the pool */
- kfree(pool);
- pool = NULL;
- }
return pool;
}
EXPORT_SYMBOL(ptlrpc_init_rq_pool);
{
struct ptlrpc_request *request = NULL;
- if (pool)
- request = ptlrpc_prep_req_from_pool(pool);
+ request = ptlrpc_request_cache_alloc(GFP_NOFS);
- if (!request)
- request = ptlrpc_request_cache_alloc(GFP_NOFS);
+ if (!request && pool)
+ request = ptlrpc_prep_req_from_pool(pool);
if (request) {
LASSERTF((unsigned long)imp > 0x1000, "%p", imp);
projects / platform / kernel / linux-rpi.git / commitdiff