The patch titled
Subject: ocfs2: speed up chain-list searching
has been added to the -mm mm-nonmm-unstable branch. Its filename is
ocfs2-speed-up-chain-list-searching.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/ocfs2-speed-up-chain-list-searching.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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 via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: Heming Zhao <heming.zhao@xxxxxxxx>
Subject: ocfs2: speed up chain-list searching
Date: Thu, 28 Mar 2024 20:52:02 +0800
Add short-circuit code to speed up searching
Link: https://lkml.kernel.org/r/20240328125203.20892-4-heming.zhao@xxxxxxxx
Signed-off-by: Heming Zhao <heming.zhao@xxxxxxxx>
Reviewed-by: Joseph Qi <joseph.qi@xxxxxxxxxxxxxxxxx>
Cc: Changwei Ge <gechangwei@xxxxxxx>
Cc: Gang He <ghe@xxxxxxxx>
Cc: Joel Becker <jlbec@xxxxxxxxxxxx>
Cc: Jun Piao <piaojun@xxxxxxxxxx>
Cc: Junxiao Bi <junxiao.bi@xxxxxxxxxx>
Cc: Mark Fasheh <mark@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/ocfs2/suballoc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/ocfs2/suballoc.c~ocfs2-speed-up-chain-list-searching
+++ a/fs/ocfs2/suballoc.c
@@ -2006,7 +2006,7 @@ static int ocfs2_claim_suballoc_bits(str
for (i = 0; i < le16_to_cpu(cl->cl_next_free_rec); i ++) {
if (i == victim)
continue;
- if (!cl->cl_recs[i].c_free)
+ if (le32_to_cpu(cl->cl_recs[i].c_free) < bits_wanted)
continue;
ac->ac_chain = i;
_
Patches currently in -mm which might be from heming.zhao@xxxxxxxx are
ocfs2-improve-write-io-performance-when-fragmentation-is-high.patch
ocfs2-adjust-enabling-place-for-la-window.patch
ocfs2-speed-up-chain-list-searching.patch
ocfs2-fix-sparse-warnings.patch
