Commit ae2e2804 authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

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: default avatarChao Yu <chao@kernel.org>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent e64347ae

Documentation/ABI/testing/sysfs-fs-f2fs

+5 −0
Original line number Diff line number Diff line
@@ -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>

fs/f2fs/sysfs.c

+11 −0
Original line number Diff line number Diff line
@@ -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),