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| author | Sahitya Tummala <stummala@codeaurora.org> | 2019-07-29 10:50:26 +0530 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2019-09-09 13:06:11 +0100 |
| commit | 957fa47823dfe449c5a15a944e4e7a299a6601db (patch) | |
| tree | a58f58dbf5ce86e54f670308baa03326abcb2d8b /fs/f2fs | |
| parent | cfb9a34d147b8d002d4330ddb53a3eb79565d17c (diff) | |
| download | linux-957fa47823dfe449c5a15a944e4e7a299a6601db.tar.bz2 | |
f2fs: Fix indefinite loop in f2fs_gc()
Policy - foreground GC, LFS mode and greedy GC mode.
Under this policy, f2fs_gc() loops forever to GC as it doesn't have
enough free segements to proceed and thus it keeps calling gc_more
for the same victim segment. This can happen if the selected victim
segment could not be GC'd due to failed blkaddr validity check i.e.
is_alive() returns false for the blocks set in current validity map.
Fix this by not resetting the sbi->cur_victim_sec to NULL_SEGNO, when
the segment selected could not be GC'd. This helps to select another
segment for GC and thus helps to proceed forward with GC.
[Note]
This can happen due to is_alive as well as atomic_file which skipps
GC.
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/gc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c index e88f98ddf396..5877bd729689 100644 --- a/fs/f2fs/gc.c +++ b/fs/f2fs/gc.c @@ -1326,7 +1326,7 @@ gc_more: round++; } - if (gc_type == FG_GC) + if (gc_type == FG_GC && seg_freed) sbi->cur_victim_sec = NULL_SEGNO; if (sync) |