Re: [PATCH 2/4] f2fs: fix to don't call f2fs_stop_checkpoint in spinlock coverage

Jaegeuk Kim
2024-02-27T17:50:19Z

On 02/22, Chao Yu wrote:
> f2fs_stop_checkpoint(, false) is complex and it may sleep, so we should
> move it outside segmap_lock spinlock coverage in get_new_segment().

Chao, I merged this patch into

https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git/commit/?h=dev-test&id=f3b576d209983b5d6e1cb130bfc8ca1f0bbcad6d

>
> Signed-off-by: Chao Yu <chao@kernel.org>
> ---
> fs/f2fs/segment.c | 12 +++++++++---
> 1 file changed, 9 insertions(+), 3 deletions(-)
>
> diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> index d0209ea77dd2..8edc42071e6f 100644
> --- a/fs/f2fs/segment.c
> +++ b/fs/f2fs/segment.c
> @@ -2646,6 +2646,7 @@ static void get_new_segment(struct f2fs_sb_info *sbi,
> unsigned int old_zoneno = GET_ZONE_FROM_SEG(sbi, *newseg);
> bool init = true;
> int i;
> + int ret = 0;
>
> spin_lock(&free_i->segmap_lock);
>
> @@ -2671,9 +2672,8 @@ static void get_new_segment(struct f2fs_sb_info *sbi,
> secno = find_first_zero_bit(free_i->free_secmap,
> MAIN_SECS(sbi));
> if (secno >= MAIN_SECS(sbi)) {
> - f2fs_stop_checkpoint(sbi, false,
> - STOP_CP_REASON_NO_SEGMENT);
> - f2fs_bug_on(sbi, 1);
> + ret = -ENOSPC;
> + goto out_unlock;
> }
> }
> segno = GET_SEG_FROM_SEC(sbi, secno);
> @@ -2704,7 +2704,13 @@ static void get_new_segment(struct f2fs_sb_info *sbi,
> f2fs_bug_on(sbi, test_bit(segno, free_i->free_segmap));
> __set_inuse(sbi, segno);
> *newseg = segno;
> +out_unlock:
> spin_unlock(&free_i->segmap_lock);
> +
> + if (ret) {
> + f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_NO_SEGMENT);
> + f2fs_bug_on(sbi, 1);
> + }
> }
>
> static void reset_curseg(struct f2fs_sb_info *sbi, int type, int modified)
> --
> 2.40.1