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Subject[PATCH] f2fs: prevent meta updates while checkpoint is in progress
Date
allocate_segment_for_resize() can cause metapage updates if
it requires to change the current node/data segments for resizing.
Stop these meta updates when there is a checkpoint already
in progress to prevent inconsistent CP data.

Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
---
fs/f2fs/gc.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 5bca560..6122bad 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -1399,8 +1399,10 @@ static int free_segment_range(struct f2fs_sb_info *sbi, unsigned int start,
int err = 0;

/* Move out cursegs from the target range */
+ f2fs_lock_op(sbi);
for (type = CURSEG_HOT_DATA; type < NR_CURSEG_TYPE; type++)
allocate_segment_for_resize(sbi, type, start, end);
+ f2fs_unlock_op(sbi);

/* do GC to move out valid blocks in the range */
for (segno = start; segno <= end; segno += sbi->segs_per_sec) {
--
Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.
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