Viewing: ext4-reflect-mb_optimize_scan-value-in-options.patch
commit 3fa5d23e68a34dae9df2be168750dc5e03e0e40d
Author: Ojaswin Mujoo <ojaswin@linux.ibm.com>
AuthorDate: Mon Jul 4 11:16:03 2022 +0530
ext4: reflect mb_optimize_scan value in options file
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>
Link: https://lore.kernel.org/r/20220704054603.21462-1-ojaswin@linux.ibm.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
Index: linux-stage/fs/ext4/super.c
===================================================================
--- linux-stage.orig/fs/ext4/super.c
+++ linux-stage/fs/ext4/super.c
@@ -2488,6 +2488,14 @@ static int _ext4_show_options(struct seq
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;
}
