leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

f2fs: avoid race condition for shrinker count

Browse Source 
Light reported sometimes shinker gets nat_cnt < dirty_nat_cnt resulting in
wrong do_shinker work. Let's avoid to return insane overflowed value by adding
single tracking value.

Reported-by: Light Hsieh <Light.Hsieh@mediatek.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim
2020-11-06 13:22:05 -08:00
parent 5fdb322ff2
commit a95ba66ac1
6 changed files with 36 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
fs/f2fs/shrinker.c
View File

@@ -18,9 +18,7 @@ static unsigned int shrinker_run_no;
static unsigned long __count_nat_entries(struct f2fs_sb_info *sbi)
{
long count = NM_I(sbi)->nat_cnt - NM_I(sbi)->dirty_nat_cnt;
return count > 0 ? count : 0;
return NM_I(sbi)->nat_cnt[RECLAIMABLE_NAT];
}
static unsigned long __count_free_nids(struct f2fs_sb_info *sbi)