On 2022/5/4 4:30, Jaegeuk Kim wrote:
The f2fs_gc uses a bitmap to indicate pinned sections, but when disabling
chckpoint, we call f2fs_gc() with NULL_SEGNO which selects the same dirty
segment as a victim all the time, resulting in checkpoint=disable failure.
Let's pick another one, if we fail to collect it.

Signed-off-by: Jaegeuk Kim <[email protected]>
---
  fs/f2fs/gc.c | 5 +----
  1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 4d47723523c3..5ba8104e138b 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -1838,10 +1838,7 @@ int f2fs_gc(struct f2fs_sb_info *sbi, bool sync,
        if (gc_type == FG_GC)
                sbi->cur_victim_sec = NULL_SEGNO;
- if (sync)
-               goto stop;

Semantics of 'sync' parameter should be: migrate one section at least before
exit?

So, should it be?

if (seg_freed && (sync || !has_not_enough_free_secs(sbi, sec_freed, 0)))
        goto stop;

Thanks,

-
-       if (!has_not_enough_free_secs(sbi, sec_freed, 0))
+       if (!has_not_enough_free_secs(sbi, sec_freed, 0) && seg_freed)
                goto stop;
if (skipped_round <= MAX_SKIP_GC_COUNT || skipped_round * 2 < round) {


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