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f2fs: show number of pending discard commands 

This information can be used to check how much time we need to give to issue
all the discard commands.

Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2021-11-29 10:36:12 -08:00
parent e64347ae13
commit ae2e2804ca
2 changed files with 16 additions and 0 deletions
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5
Documentation/ABI/testing/sysfs-fs-f2fs
View File

@ -112,6 +112,11 @@ Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
Description: Set timeout to issue discard commands during umount.
Default: 5 secs
What: /sys/fs/f2fs/<disk>/pending_discard
Date: November 2021
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
Description: Shows the number of pending discard commands in the queue.
What: /sys/fs/f2fs/<disk>/max_victim_search
Date: January 2014
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>

11
fs/f2fs/sysfs.c
View File

@ -118,6 +118,15 @@ static ssize_t sb_status_show(struct f2fs_attr *a,
return sprintf(buf, "%lx\n", sbi->s_flag);
}
static ssize_t pending_discard_show(struct f2fs_attr *a,
struct f2fs_sb_info *sbi, char *buf)
{
if (!SM_I(sbi)->dcc_info)
return -EINVAL;
return sprintf(buf, "%llu\n", (unsigned long long)atomic_read(
&SM_I(sbi)->dcc_info->discard_cmd_cnt));
}
static ssize_t features_show(struct f2fs_attr *a,
struct f2fs_sb_info *sbi, char *buf)
{
@ -744,6 +753,7 @@ F2FS_GENERAL_RO_ATTR(unusable);
F2FS_GENERAL_RO_ATTR(encoding);
F2FS_GENERAL_RO_ATTR(mounted_time_sec);
F2FS_GENERAL_RO_ATTR(main_blkaddr);
F2FS_GENERAL_RO_ATTR(pending_discard);
#ifdef CONFIG_F2FS_STAT_FS
F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, cp_foreground_calls, cp_count);
F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, cp_background_calls, bg_cp_count);
@ -812,6 +822,7 @@ static struct attribute *f2fs_attrs[] = {
ATTR_LIST(main_blkaddr),
ATTR_LIST(max_small_discards),
ATTR_LIST(discard_granularity),
ATTR_LIST(pending_discard),
ATTR_LIST(batched_trim_sections),
ATTR_LIST(ipu_policy),
ATTR_LIST(min_ipu_util),