[f2fs-dev] [PATCH] f2fs: fix using wrong 'submitted' value in f2fs_write_cache_pages

[f2fs-dev] [PATCH] f2fs: fix using wrong 'submitted' value in f2fs_write_cache_pages

[zangyangyang1 via Linux-f2fs-devel]

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When f2fs_write_single_data_page fails, f2fs_write_cache_pages
will use the last 'submitted' value incorrectly, which will cause
'nwritten' and 'wbc->nr_to_write' calculation errors

Signed-off-by: zangyangyang1 <zangyangyang1@xiaomi.com>
---
 fs/f2fs/data.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 94f7b084f601..083acd7f5420 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -3179,6 +3179,7 @@ static int f2fs_write_cache_pages(struct address_space *mapping,
                                continue;
                        }
 #endif
+                       submitted = 0;
                        ret = f2fs_write_single_data_page(folio,
                                        &submitted, &bio, &last_block,
                                        wbc, io_type, 0, true);
--
2.43.2

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Re: [f2fs-dev] [PATCH] f2fs: fix using wrong 'submitted' value in f2fs_write_cache_pages

[Chao Yu via Linux-f2fs-devel]

On 2024/12/24 19:46, zangyangyang1 via Linux-f2fs-devel wrote:
> When f2fs_write_single_data_page fails, f2fs_write_cache_pages
> will use the last 'submitted' value incorrectly, which will cause
> 'nwritten' and 'wbc->nr_to_write' calculation errors
 > > Signed-off-by: zangyangyang1 <zangyangyang1@xiaomi.com>
> ---
>   fs/f2fs/data.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
> index 94f7b084f601..083acd7f5420 100644
> --- a/fs/f2fs/data.c
> +++ b/fs/f2fs/data.c
> @@ -3179,6 +3179,7 @@ static int f2fs_write_cache_pages(struct address_space *mapping,
>                                  continue;
>                          }
>   #endif
> +                       submitted = 0;

How about initializing "submitted" in f2fs_write_single_data_page()
to cover all cases in where we call f2fs_write_single_data_page()?

Thanks,

>                          ret = f2fs_write_single_data_page(folio,
>                                          &submitted, &bio, &last_block,
>                                          wbc, io_type, 0, true);
> --
> 2.43.2



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Re: [f2fs-dev] [PATCH] f2fs: fix using wrong 'submitted' value in f2fs_write_cache_pages

[臧阳阳]

Chao Yu via Linux-f2fs-devel <linux-f2fs-devel@lists.sourceforge.net>
于2024年12月26日周四 21:32写道：
>
> On 2024/12/24 19:46, zangyangyang1 via Linux-f2fs-devel wrote:
> > When f2fs_write_single_data_page fails, f2fs_write_cache_pages
> > will use the last 'submitted' value incorrectly, which will cause
> > 'nwritten' and 'wbc->nr_to_write' calculation errors
>  > > Signed-off-by: zangyangyang1 <zangyangyang1@xiaomi.com>
> > ---
> >   fs/f2fs/data.c | 1 +
> >   1 file changed, 1 insertion(+)
> >
> > diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
> > index 94f7b084f601..083acd7f5420 100644
> > --- a/fs/f2fs/data.c
> > +++ b/fs/f2fs/data.c
> > @@ -3179,6 +3179,7 @@ static int f2fs_write_cache_pages(struct address_space *mapping,
> >                                  continue;
> >                          }
> >   #endif
> > +                       submitted = 0;
>
> How about initializing "submitted" in f2fs_write_single_data_page()
> to cover all cases in where we call f2fs_write_single_data_page()?
Hi, My first change was in f2fs_write_single_data_page(), but that
added two lines of code,
so I put the change in f2fs_write_cache_pages(), but I forgot that
compression also
calls f2fs_write_single_data_page(), I will fix it.
Thanks,
> Thanks,
>
> >                          ret = f2fs_write_single_data_page(folio,
> >                                          &submitted, &bio, &last_block,
> >                                          wbc, io_type, 0, true);
> > --
> > 2.43.2
>
>
>
> _______________________________________________
> Linux-f2fs-devel mailing list
> Linux-f2fs-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel


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