The patch titled
Subject: ocfs2: ratelimit the 'max lookup times reached' notice
has been added to the -mm tree. Its filename is
ocfs2-ratelimit-the-max-lookup-times-reached-notice.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/ocfs2-ratelimit-the-max-lookup-times-reached-notice.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/ocfs2-ratelimit-the-max-lookup-times-reached-notice.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Mauricio Faria de Oliveira <mfo@xxxxxxxxxxxxx>
Subject: ocfs2: ratelimit the 'max lookup times reached' notice
Running stress-ng on ocfs2 completely fills the kernel log with 'max
lookup times reached, filesystem may have nested directories.'
Let's ratelimit this message as done with others in the code.
Test-case:
# mkfs.ocfs2 --mount local $DEV
# mount $DEV $MNT
# cd $MNT
# dmesg -C
# stress-ng --dirdeep 1 --dirdeep-ops 1000
# dmesg | grep -c 'max lookup times reached'
Before:
# dmesg -C
# stress-ng --dirdeep 1 --dirdeep-ops 1000
...
stress-ng: info: [11116] successful run completed in 3.03s
# dmesg | grep -c 'max lookup times reached'
967
After:
# dmesg -C
# stress-ng --dirdeep 1 --dirdeep-ops 1000
...
stress-ng: info: [739] successful run completed in 0.96s
# dmesg | grep -c 'max lookup times reached'
10
# dmesg
[ 259.086086] ocfs2_check_if_ancestor: 1990 callbacks suppressed
[ 259.086092] (stress-ng-dirde,740,1):ocfs2_check_if_ancestor:1091 max lookup times reached, filesystem may have nested directories, src inode: 18007, dest inode: 17940.
...
Link: https://lkml.kernel.org/r/20201001224417.478263-1-mfo@xxxxxxxxxxxxx
Signed-off-by: Mauricio Faria de Oliveira <mfo@xxxxxxxxxxxxx>
Reviewed-by: Joseph Qi <joseph.qi@xxxxxxxxxxxxxxxxx>
Cc: Mark Fasheh <mark@xxxxxxxxxx>
Cc: Joel Becker <jlbec@xxxxxxxxxxxx>
Cc: Junxiao Bi <junxiao.bi@xxxxxxxxxx>
Cc: Changwei Ge <gechangwei@xxxxxxx>
Cc: Gang He <ghe@xxxxxxxx>
Cc: Jun Piao <piaojun@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/ocfs2/namei.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/fs/ocfs2/namei.c~ocfs2-ratelimit-the-max-lookup-times-reached-notice
+++ a/fs/ocfs2/namei.c
@@ -1088,8 +1088,8 @@ static int ocfs2_check_if_ancestor(struc
child_inode_no = parent_inode_no;
if (++i >= MAX_LOOKUP_TIMES) {
- mlog(ML_NOTICE, "max lookup times reached, filesystem "
- "may have nested directories, "
+ mlog_ratelimited(ML_NOTICE, "max lookup times reached, "
+ "filesystem may have nested directories, "
"src inode: %llu, dest inode: %llu.\n",
(unsigned long long)src_inode_no,
(unsigned long long)dest_inode_no);
_
Patches currently in -mm which might be from mfo@xxxxxxxxxxxxx are
ocfs2-ratelimit-the-max-lookup-times-reached-notice.patch
