linux-kernel - Re: [f2fs-dev] [PATCH 3/4] f2fs: clean up new

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Message-ID: <CACOAw_xQnfFpvWn18tu-T-m0+P+xxPFxwguG2k8VodvxFd42XA@mail.gmail.com>
Date: Thu, 29 Feb 2024 09:58:43 -0800
From: Daeho Jeong <daeho43@...il.com>
To: Chao Yu <chao@...nel.org>
Cc: jaegeuk@...nel.org, linux-kernel@...r.kernel.org, 
	linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [f2fs-dev] [PATCH 3/4] f2fs: clean up new_curseg()

Reviewed-by: Daeho Jeong <daehojeong@...gle.com>

Thanks,

On Sun, Feb 25, 2024 at 5:33 PM Chao Yu <chao@...nel.org> wrote:
>
> Move f2fs_valid_pinned_area() check logic from new_curseg() to
> get_new_segment(), it can avoid calling __set_free() if it fails
> to find free segment in conventional zone for pinned file.
>
> Signed-off-by: Chao Yu <chao@...nel.org>
> ---
>  fs/f2fs/segment.c | 23 ++++++++++++++---------
>  1 file changed, 14 insertions(+), 9 deletions(-)
>
> diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> index 847fe0b7f29f..c159b0985596 100644
> --- a/fs/f2fs/segment.c
> +++ b/fs/f2fs/segment.c
> @@ -2715,12 +2715,19 @@ static int get_new_segment(struct f2fs_sb_info *sbi,
>  got_it:
>         /* set it as dirty segment in free segmap */
>         f2fs_bug_on(sbi, test_bit(segno, free_i->free_segmap));
> +
> +       /* no free section in conventional zone */
> +       if (new_sec && pinning &&
> +               !f2fs_valid_pinned_area(sbi, START_BLOCK(sbi, segno))) {
> +               ret = -EAGAIN;
> +               goto out_unlock;
> +       }
>         __set_inuse(sbi, segno);
>         *newseg = segno;
>  out_unlock:
>         spin_unlock(&free_i->segmap_lock);
>
> -       if (ret) {
> +       if (ret == -ENOSPC) {
>                 f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_NO_SEGMENT);
>                 f2fs_bug_on(sbi, 1);
>         }
> @@ -2796,19 +2803,17 @@ static int new_curseg(struct f2fs_sb_info *sbi, int type, bool new_sec)
>         struct curseg_info *curseg = CURSEG_I(sbi, type);
>         unsigned int segno = curseg->segno;
>         bool pinning = type == CURSEG_COLD_DATA_PINNED;
> +       int ret;
>
>         if (curseg->inited)
>                 write_sum_page(sbi, curseg->sum_blk, GET_SUM_BLOCK(sbi, segno));
>
>         segno = __get_next_segno(sbi, type);
> -       if (get_new_segment(sbi, &segno, new_sec, pinning)) {
> -               curseg->segno = NULL_SEGNO;
> -               return -ENOSPC;
> -       }
> -       if (new_sec && pinning &&
> -           !f2fs_valid_pinned_area(sbi, START_BLOCK(sbi, segno))) {
> -               __set_free(sbi, segno);
> -               return -EAGAIN;
> +       ret = get_new_segment(sbi, &segno, new_sec, pinning);
> +       if (ret) {
> +               if (ret == -ENOSPC)
> +                       curseg->segno = NULL_SEGNO;
> +               return ret;
>         }
>
>         curseg->next_segno = segno;
> --
> 2.40.1
>
>
>
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