f2fs: add undiscard blocks stat

This patch adds to account undiscard blocks.

Signed-off-by: Chao Yu <yuchao0@huawei.com>

diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
index 692beff..6102737 100644 (file)
--- a/fs/f2fs/debug.c
+++ b/fs/f2fs/debug.c
@@ -69,6 +69,7 @@ static void update_general_status(struct f2fs_sb_info *sbi)
                        atomic_read(&SM_I(sbi)->dcc_info->issing_discard);
                si->nr_discard_cmd =
                        atomic_read(&SM_I(sbi)->dcc_info->discard_cmd_cnt);
+               si->undiscard_blks = SM_I(sbi)->dcc_info->undiscard_blks;
        }
        si->total_count = (int)sbi->user_block_count / sbi->blocks_per_seg;
        si->rsvd_segs = reserved_segments(sbi);
@@ -348,11 +349,11 @@ static int stat_show(struct seq_file *s, void *v)
                                si->ext_tree, si->zombie_tree, si->ext_node);
                seq_puts(s, "\nBalancing F2FS Async:\n");
                seq_printf(s, "  - IO (CP: %4d, Data: %4d, Flush: (%4d %4d), "
-                       "Discard: (%4d %4d)) cmd: %4d\n",
+                       "Discard: (%4d %4d)) cmd: %4d undiscard:%4u\n",
                           si->nr_wb_cp_data, si->nr_wb_data,
                           si->nr_flushing, si->nr_flushed,
                           si->nr_discarding, si->nr_discarded,
-                          si->nr_discard_cmd);
+                          si->nr_discard_cmd, si->undiscard_blks);
                seq_printf(s, "  - inmem: %4d, atomic IO: %4d (Max. %4d), "
                        "volatile IO: %4d (Max. %4d)\n",
                           si->inmem_pages, si->aw_cnt, si->max_aw_cnt,

diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 37911ef..58d288e 100644 (file)
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -232,6 +232,7 @@ struct discard_cmd_control {
        struct mutex cmd_lock;
        int nr_discards;                        /* # of discards in the list */
        int max_discards;                       /* max. discards to be issued */
+       unsigned int undiscard_blks;            /* # of undiscard blocks */
        atomic_t issued_discard;                /* # of issued discard */
        atomic_t issing_discard;                /* # of issing discard */
        atomic_t discard_cmd_cnt;               /* # of cached cmd count */
@@ -2390,6 +2391,7 @@ struct f2fs_stat_info {
        int bg_gc, nr_wb_cp_data, nr_wb_data;
        int nr_flushing, nr_flushed, nr_discarding, nr_discarded;
        int nr_discard_cmd;
+       unsigned int undiscard_blks;
        int inline_xattr, inline_inode, inline_dir, append, update, orphans;
        int aw_cnt, max_aw_cnt, vw_cnt, max_vw_cnt;
        unsigned int valid_count, valid_node_count, valid_inode_count, discard_blks;

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index f882716..dd07c5c 100644 (file)
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -695,6 +695,7 @@ static struct discard_cmd *__create_discard_cmd(struct f2fs_sb_info *sbi,
        init_completion(&dc->wait);
        list_add_tail(&dc->list, pend_list);
        atomic_inc(&dcc->discard_cmd_cnt);
+       dcc->undiscard_blks += len;
 
        return dc;
 }
@@ -723,6 +724,7 @@ static void __detach_discard_cmd(struct discard_cmd_control *dcc,
 
        list_del(&dc->list);
        rb_erase(&dc->rb_node, &dcc->root);
+       dcc->undiscard_blks -= dc->len;
 
        kmem_cache_free(discard_cmd_slab, dc);
 
@@ -830,8 +832,11 @@ static void __punch_discard_cmd(struct f2fs_sb_info *sbi,
                return;
        }
 
+       dcc->undiscard_blks -= di.len;
+
        if (blkaddr > di.lstart) {
                dc->len = blkaddr - dc->lstart;
+               dcc->undiscard_blks += dc->len;
                __relocate_discard_cmd(dcc, dc);
                f2fs_bug_on(sbi, !__check_rb_tree_consistence(sbi, &dcc->root));
                modified = true;
@@ -849,6 +854,7 @@ static void __punch_discard_cmd(struct f2fs_sb_info *sbi,
                        dc->lstart++;
                        dc->len--;
                        dc->start++;
+                       dcc->undiscard_blks += dc->len;
                        __relocate_discard_cmd(dcc, dc);
                        f2fs_bug_on(sbi,
                                !__check_rb_tree_consistence(sbi, &dcc->root));
@@ -910,6 +916,7 @@ static void __update_discard_tree_range(struct f2fs_sb_info *sbi,
                        prev_dc->bdev == bdev &&
                        __is_discard_back_mergeable(&di, &prev_dc->di)) {
                        prev_dc->di.len += di.len;
+                       dcc->undiscard_blks += di.len;
                        __relocate_discard_cmd(dcc, prev_dc);
                        f2fs_bug_on(sbi,
                                !__check_rb_tree_consistence(sbi, &dcc->root));
@@ -924,6 +931,7 @@ static void __update_discard_tree_range(struct f2fs_sb_info *sbi,
                        next_dc->di.lstart = di.lstart;
                        next_dc->di.len += di.len;
                        next_dc->di.start = di.start;
+                       dcc->undiscard_blks += di.len;
                        __relocate_discard_cmd(dcc, next_dc);
                        if (tdc)
                                __remove_discard_cmd(sbi, tdc);
@@ -1357,6 +1365,7 @@ static int create_discard_cmd_control(struct f2fs_sb_info *sbi)
        atomic_set(&dcc->discard_cmd_cnt, 0);
        dcc->nr_discards = 0;
        dcc->max_discards = 0;
+       dcc->undiscard_blks = 0;
        dcc->root = RB_ROOT;
 
        init_waitqueue_head(&dcc->discard_wait_queue);