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SubjectRe: [PATCH v2] f2fs: collect prefree segments to avoild write checkpoint fail
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On 2017/9/1 20:00, Yunlong Song wrote:
> In come corner case, the reserved segments are used to do gc, and there are
> not enough free segments for write checkpoint to finish its job, then the
> gc process will fail to change the prefree segments to free segments.
>
> Signed-off-by: Yunlong Song <yunlong.song@huawei.com>
> ---
> fs/f2fs/gc.c | 10 ++++++++++
> 1 file changed, 10 insertions(+)
>
> diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
> index cd147e7..6552b04 100644
> --- a/fs/f2fs/gc.c
> +++ b/fs/f2fs/gc.c
> @@ -1056,6 +1056,16 @@ int f2fs_gc(struct f2fs_sb_info *sbi, bool sync,
> if (!sync) {
> if (has_not_enough_free_secs(sbi, sec_freed, 0)) {
> segno = NULL_SEGNO;
> +#ifndef CONFIG_F2FS_CHECK_FS
> + if (prefree_segments(sbi) &&
> + has_not_enough_free_secs(sbi,
> + reserved_sections(sbi), 0)) {
> + ret = write_checkpoint(sbi, &cpc);
> + if (ret)
> + goto stop;
> + sec_freed = 0;
> + }
> +#endif
> goto gc_more;
> }
>

--
Thanks,
Yunlong Song


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