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f2fs: show # of on-going flush and discard bios 

This patch adds stat information for flush and discard commands.

Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2017-01-11 10:20:04 -08:00
parent 1546996348
commit dcc9165dbf
3 changed files with 17 additions and 3 deletions
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11
fs/f2fs/debug.c
View File

@ -54,6 +54,12 @@ static void update_general_status(struct f2fs_sb_info *sbi)
si->max_aw_cnt = atomic_read(&sbi->max_aw_cnt);
si->nr_wb_cp_data = get_pages(sbi, F2FS_WB_CP_DATA);
si->nr_wb_data = get_pages(sbi, F2FS_WB_DATA);
if (SM_I(sbi) && SM_I(sbi)->fcc_info)
si->nr_flush =
atomic_read(&SM_I(sbi)->fcc_info->submit_flush);
if (SM_I(sbi) && SM_I(sbi)->dcc_info)
si->nr_discard =
atomic_read(&SM_I(sbi)->dcc_info->submit_discard);
si->total_count = (int)sbi->user_block_count / sbi->blocks_per_seg;
si->rsvd_segs = reserved_segments(sbi);
si->overp_segs = overprovision_segments(sbi);
@ -318,8 +324,9 @@ static int stat_show(struct seq_file *s, void *v)
seq_printf(s, " - Inner Struct Count: tree: %d(%d), node: %d\n",
si->ext_tree, si->zombie_tree, si->ext_node);
seq_puts(s, "\nBalancing F2FS Async:\n");
seq_printf(s, " - IO (CP: %4d, Data: %4d)\n",
si->nr_wb_cp_data, si->nr_wb_data);
seq_printf(s, " - IO (CP: %4d, Data: %4d, Flush: %4d, Discard: %4d)\n",
si->nr_wb_cp_data, si->nr_wb_data,
si->nr_flush, si->nr_discard);
seq_printf(s, " - inmem: %4d, atomic IO: %4d (Max. %4d)\n",
si->inmem_pages, si->aw_cnt, si->max_aw_cnt);
seq_printf(s, " - nodes: %4d in %4d\n",

3
fs/f2fs/f2fs.h
View File

@ -206,6 +206,7 @@ struct discard_cmd_control {
wait_queue_head_t discard_wait_queue; /* waiting queue for wake-up */
struct mutex cmd_lock;
int max_discards; /* max. discards to be issued */
atomic_t submit_discard; /* # of issued discard */
};
/* for the list of fsync inodes, used only during recovery */
@ -2262,7 +2263,7 @@ struct f2fs_stat_info {
unsigned int ndirty_dirs, ndirty_files, ndirty_all;
int nats, dirty_nats, sits, dirty_sits, free_nids, alloc_nids;
int total_count, utilization;
int bg_gc, nr_wb_cp_data, nr_wb_data;
int bg_gc, nr_wb_cp_data, nr_wb_data, nr_flush, nr_discard;
int inline_xattr, inline_inode, inline_dir, orphans;
int aw_cnt, max_aw_cnt;
unsigned int valid_count, valid_node_count, valid_inode_count, discard_blks;

6
fs/f2fs/segment.c
View File

@ -653,6 +653,9 @@ static void __remove_discard_cmd(struct f2fs_sb_info *sbi, struct discard_cmd *d
{
int err = dc->bio->bi_error;
if (dc->state == D_DONE)
atomic_dec(&(SM_I(sbi)->dcc_info->submit_discard));
if (err == -EOPNOTSUPP)
err = 0;
@ -678,6 +681,7 @@ void f2fs_wait_discard_bio(struct f2fs_sb_info *sbi, block_t blkaddr)
if (dc->state == D_PREP) {
dc->state = D_SUBMIT;
submit_bio(dc->bio);
atomic_inc(&dcc->submit_discard);
}
wait_for_completion_io(&dc->wait);
@ -723,6 +727,7 @@ repeat:
if (dc->state == D_PREP) {
dc->state = D_SUBMIT;
submit_bio(dc->bio);
atomic_inc(&dcc->submit_discard);
if (iter++ > DISCARD_ISSUE_RATE)
break;
} else if (dc->state == D_DONE) {
@ -1049,6 +1054,7 @@ int create_discard_cmd_control(struct f2fs_sb_info *sbi)
INIT_LIST_HEAD(&dcc->discard_entry_list);
INIT_LIST_HEAD(&dcc->discard_cmd_list);
mutex_init(&dcc->cmd_lock);
atomic_set(&dcc->submit_discard, 0);
dcc->nr_discards = 0;
dcc->max_discards = 0;