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[PATCH] f2fs: fix to clear unusable_cap for checkpoint=enable

Chao Yu posted 1 patch 6 months ago 
fs/f2fs/super.c | 4 ++++
1 file changed, 4 insertions(+)
[PATCH] f2fs: fix to clear unusable_cap for checkpoint=enable
Posted by Chao Yu 6 months ago 
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 <chao@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;
 			ctx_clear_opt(ctx, F2FS_MOUNT_DISABLE_CHECKPOINT);
 			break;
 		default:
-- 
2.49.0
Re: [f2fs-dev] [PATCH] f2fs: fix to clear unusable_cap for checkpoint=enable
Posted by Zhiguo Niu 6 months ago 
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 <chao@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
>
>
>
> _______________________________________________
> Linux-f2fs-devel mailing list
> Linux-f2fs-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
Re: [f2fs-dev] [PATCH] f2fs: fix to clear unusable_cap for checkpoint=enable
Posted by Chao Yu 6 months ago 
On 8/8/2025 9:07 AM, Zhiguo Niu wrote:
> 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 <chao@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.

Zhiguo,

IMO, F2FS_SPEC_checkpoint_disable_cap_perc or F2FS_SPEC_checkpoint_disable_cap
flags can be added to ctx->spec_mask to indicate ctx.unusable_cap_perc or
ctx.unusable_cap has been updated, then we can store last parameter value from
ctx to sbi in f2fs_apply_options() as below:

	if (ctx->spec_mask & F2FS_SPEC_checkpoint_disable_cap)
		F2FS_OPTION(sbi).unusable_cap = F2FS_CTX_INFO(ctx).unusable_cap;
	if (ctx->spec_mask & F2FS_SPEC_checkpoint_disable_cap_perc)
		F2FS_OPTION(sbi).unusable_cap_perc =
					F2FS_CTX_INFO(ctx).unusable_cap_perc;

Or am I missing something here?

Thanks,

> thanks!
>>                          ctx_clear_opt(ctx, F2FS_MOUNT_DISABLE_CHECKPOINT);
>>                          break;
>>                  default:
>> --
>> 2.49.0
>>
>>
>>
>> _______________________________________________
>> Linux-f2fs-devel mailing list
>> Linux-f2fs-devel@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
Re: [f2fs-dev] [PATCH] f2fs: fix to clear unusable_cap for checkpoint=enable
Posted by Zhiguo Niu 6 months ago 
Chao Yu <chao@kernel.org> 于2025年8月8日周五 12:14写道：
>
> On 8/8/2025 9:07 AM, Zhiguo Niu wrote:
> > 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 <chao@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.
>
> Zhiguo,
>
> IMO, F2FS_SPEC_checkpoint_disable_cap_perc or F2FS_SPEC_checkpoint_disable_cap
> flags can be added to ctx->spec_mask to indicate ctx.unusable_cap_perc or
> ctx.unusable_cap has been updated, then we can store last parameter value from
> ctx to sbi in f2fs_apply_options() as below:
>
>         if (ctx->spec_mask & F2FS_SPEC_checkpoint_disable_cap)
>                 F2FS_OPTION(sbi).unusable_cap = F2FS_CTX_INFO(ctx).unusable_cap;
>         if (ctx->spec_mask & F2FS_SPEC_checkpoint_disable_cap_perc)
>                 F2FS_OPTION(sbi).unusable_cap_perc =
>                                         F2FS_CTX_INFO(ctx).unusable_cap_perc;
>
> Or am I missing something here?
Hi Chao,

Ah,  yes you are right！
There's something wrong with my thinking.
thank you for your explanation, sorry for the disturbance.
thanks!
>
> Thanks,
>
> > thanks!
> >>                          ctx_clear_opt(ctx, F2FS_MOUNT_DISABLE_CHECKPOINT);
> >>                          break;
> >>                  default:
> >> --
> >> 2.49.0
> >>
> >>
> >>
> >> _______________________________________________
> >> Linux-f2fs-devel mailing list
> >> Linux-f2fs-devel@lists.sourceforge.net
> >> https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
>

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