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| author | Sahitya Tummala <stummala@codeaurora.org> | 2019-08-07 16:40:32 +0300 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2019-08-23 17:57:15 +0300 |
| commit | bbf9f7d90f21e05e31b7cdd95b32f64dd2819dfe (patch) | |
| tree | a46622dd284119f5c32e66ec38c7bf496dff193f /fs/f2fs/segment.h | |
| parent | 2fde3dd14efe8ceb21a92c2749394a5df61cb7df (diff) | |
| download | linux-bbf9f7d90f21e05e31b7cdd95b32f64dd2819dfe.tar.xz | |
f2fs: Fix indefinite loop in f2fs_gc()
Policy - Foreground GC, LFS 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 keeping track of such invalid segments and skip those
segments for selection in get_victim_by_default() to avoid endless
GC loop under such error scenarios. Currently, add this logic under
CONFIG_F2FS_CHECK_FS to be able to root cause the issue in debug
version.
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
[Jaegeuk Kim: fix wrong bitmap size]
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/segment.h')
| -rw-r--r-- | fs/f2fs/segment.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h index ec4d568fd58c..b219009c3e20 100644 --- a/fs/f2fs/segment.h +++ b/fs/f2fs/segment.h @@ -230,6 +230,9 @@ struct sit_info { char *sit_bitmap; /* SIT bitmap pointer */ #ifdef CONFIG_F2FS_CHECK_FS char *sit_bitmap_mir; /* SIT bitmap mirror */ + + /* bitmap of segments to be ignored by GC in case of errors */ + unsigned long *invalid_segmap; #endif unsigned int bitmap_size; /* SIT bitmap size */ |