* [PATCH] ext4: Reflect mb_optimize_scan value in options file
@ 2022-07-04 5:46 Ojaswin Mujoo
2022-07-22 13:58 ` Theodore Ts'o
0 siblings, 1 reply; 2+ messages in thread
From: Ojaswin Mujoo @ 2022-07-04 5:46 UTC (permalink / raw)
To: linux-ext4; +Cc: Theodore Ts'o, Ritesh Harjani, linux-fsdevel, linux-kernel
Add support to display the mb_optimize_scan value in
/proc/fs/ext4/<dev>/options file. The option is only
displayed when the value is non default.
Signed-off-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
---
fs/ext4/super.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 845f2f8aee5f..e3fd50b0d6b7 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3011,6 +3011,15 @@ static int _ext4_show_options(struct seq_file *seq, struct super_block *sb,
} else if (test_opt2(sb, DAX_INODE)) {
SEQ_OPTS_PUTS("dax=inode");
}
+
+ if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD &&
+ !test_opt2(sb, MB_OPTIMIZE_SCAN)) {
+ SEQ_OPTS_PUTS("mb_optimize_scan=0");
+ } else if (sbi->s_groups_count < MB_DEFAULT_LINEAR_SCAN_THRESHOLD &&
+ test_opt2(sb, MB_OPTIMIZE_SCAN)) {
+ SEQ_OPTS_PUTS("mb_optimize_scan=1");
+ }
+
ext4_show_quota_options(seq, sb);
return 0;
}
--
2.27.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] ext4: Reflect mb_optimize_scan value in options file
2022-07-04 5:46 [PATCH] ext4: Reflect mb_optimize_scan value in options file Ojaswin Mujoo
@ 2022-07-22 13:58 ` Theodore Ts'o
0 siblings, 0 replies; 2+ messages in thread
From: Theodore Ts'o @ 2022-07-22 13:58 UTC (permalink / raw)
To: ojaswin, linux-ext4
Cc: Theodore Ts'o, linux-kernel, riteshh, linux-fsdevel
On Mon, 4 Jul 2022 11:16:03 +0530, Ojaswin Mujoo wrote:
> Add support to display the mb_optimize_scan value in
> /proc/fs/ext4/<dev>/options file. The option is only
> displayed when the value is non default.
>
>
Applied, thanks!
[1/1] ext4: Reflect mb_optimize_scan value in options file
commit: 961edf078b5606ce480ae2ebdac64ca829ea3f75
Best regards,
--
Theodore Ts'o <tytso@mit.edu>
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