Chao Yu via Linux-f2fs-devel <linux-f2fs-devel@lists.sourceforge.net>
于2025年8月7日周四 09:52写道：
>
> mount -t f2fs -o checkpoint=disable:10% /dev/vdb /mnt/f2fs/
> mount -t f2fs -o remount,checkpoint=enable /dev/vdb /mnt/f2fs/
>
> kernel log:
> F2FS-fs (vdb): Adjust unusable cap for checkpoint=disable = 204440 / 10%
>
> If we has assigned checkpoint=enable mount option, unusable_cap{,_perc}
> parameters of checkpoint=disable should be reset, then calculation and
> log print could be avoid in adjust_unusable_cap_perc().
>
> Fixes: 1ae18f71cb52 ("f2fs: fix checkpoint=disable:%u%%")
> Signed-off-by: Chao Yu <c...@kernel.org>
> ---
> fs/f2fs/super.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
> index f37004780ce0..c1f45df9efec 100644
> --- a/fs/f2fs/super.c
> +++ b/fs/f2fs/super.c
> @@ -1014,6 +1014,10 @@ static int f2fs_parse_param(struct fs_context *fc,
> struct fs_parameter *param)
> ctx_set_opt(ctx, F2FS_MOUNT_DISABLE_CHECKPOINT);
> break;
> case Opt_checkpoint_enable:
> + F2FS_CTX_INFO(ctx).unusable_cap_perc = 0;
> + ctx->spec_mask |=
> F2FS_SPEC_checkpoint_disable_cap_perc;
> + F2FS_CTX_INFO(ctx).unusable_cap = 0;
> + ctx->spec_mask |= F2FS_SPEC_checkpoint_disable_cap;
Hi Chao,
when enable checkpoint, shoud it be:
ctx->spec_mask &= ~F2FS_SPEC_checkpoint_disable_cap_perc;
ctx->spec_mask &= ~F2FS_SPEC_checkpoint_disable_cap;
please correct me if I misunderstanding.
thanks!
> ctx_clear_opt(ctx, F2FS_MOUNT_DISABLE_CHECKPOINT);
> break;
> default:
> --
> 2.49.0
>
>
>
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