f2fs: count discard command entry
Adds to count discard command entry and show the number in debugfs,
also fix to add cost of discard command cache into total comsumed
memory footprint.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
index f27e66e..906f627 100644
--- a/fs/f2fs/debug.c
+++ b/fs/f2fs/debug.c
@@ -67,6 +67,8 @@
atomic_read(&SM_I(sbi)->dcc_info->issued_discard);
si->nr_discarding =
atomic_read(&SM_I(sbi)->dcc_info->issing_discard);
+ si->nr_discard_cmd =
+ atomic_read(&SM_I(sbi)->dcc_info->discard_cmd_cnt);
}
si->total_count = (int)sbi->user_block_count / sbi->blocks_per_seg;
si->rsvd_segs = reserved_segments(sbi);
@@ -220,8 +222,11 @@
/* build merge flush thread */
if (SM_I(sbi)->fcc_info)
si->cache_mem += sizeof(struct flush_cmd_control);
- if (SM_I(sbi)->dcc_info)
+ if (SM_I(sbi)->dcc_info) {
si->cache_mem += sizeof(struct discard_cmd_control);
+ si->cache_mem += sizeof(struct discard_cmd) *
+ atomic_read(&SM_I(sbi)->dcc_info->discard_cmd_cnt);
+ }
/* free nids */
si->cache_mem += (NM_I(sbi)->nid_cnt[FREE_NID_LIST] +
@@ -343,10 +348,11 @@
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))\n",
+ "Discard: (%4d %4d)) cmd: %4d\n",
si->nr_wb_cp_data, si->nr_wb_data,
si->nr_flushing, si->nr_flushed,
- si->nr_discarding, si->nr_discarded);
+ si->nr_discarding, si->nr_discarded,
+ si->nr_discard_cmd);
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 dbdce5f..8741d51 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -216,6 +216,7 @@
int max_discards; /* max. discards to be issued */
atomic_t issued_discard; /* # of issued discard */
atomic_t issing_discard; /* # of issing discard */
+ atomic_t discard_cmd_cnt; /* # of cached cmd count */
};
/* for the list of fsync inodes, used only during recovery */
@@ -2333,6 +2334,7 @@
int total_count, utilization;
int bg_gc, nr_wb_cp_data, nr_wb_data;
int nr_flushing, nr_flushed, nr_discarding, nr_discarded;
+ int nr_discard_cmd;
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 e9c55dd..af80d89 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -693,6 +693,8 @@
mutex_lock(&dcc->cmd_lock);
list_add_tail(&dc->list, cmd_list);
mutex_unlock(&dcc->cmd_lock);
+
+ atomic_inc(&dcc->discard_cmd_cnt);
}
static void __remove_discard_cmd(struct f2fs_sb_info *sbi, struct discard_cmd *dc)
@@ -708,6 +710,7 @@
"Issue discard failed, ret: %d", dc->error);
list_del(&dc->list);
kmem_cache_free(discard_cmd_slab, dc);
+ atomic_dec(&SM_I(sbi)->dcc_info->discard_cmd_cnt);
}
static void f2fs_submit_discard_endio(struct bio *bio)
@@ -1145,6 +1148,7 @@
mutex_init(&dcc->cmd_lock);
atomic_set(&dcc->issued_discard, 0);
atomic_set(&dcc->issing_discard, 0);
+ atomic_set(&dcc->discard_cmd_cnt, 0);
dcc->nr_discards = 0;
dcc->max_discards = 0;