Re: [PATCH 3/3] f2fs: fix to cover meta flush with cp_lock

From: Jaegeuk Kim
Date: Wed May 27 2020 - 21:26:17 EST


On 05/28, Chao Yu wrote:
> On 2020/5/28 5:02, Jaegeuk Kim wrote:
> > On 05/27, Chao Yu wrote:
> >> meta inode page should be flushed under cp_lock, fix it.
> >
> > It doesn't matter for this case, yes?
>
> It's not related to discard issue.

I meant we really need this or not. :P

>
> Now, I got some progress, I can reproduce that bug occasionally.
>
> Thanks,
>
> >
> >>
> >> Signed-off-by: Chao Yu <yuchao0@xxxxxxxxxx>
> >> ---
> >> fs/f2fs/file.c | 2 ++
> >> 1 file changed, 2 insertions(+)
> >>
> >> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> >> index f7de2a1da528..0fcae4d90074 100644
> >> --- a/fs/f2fs/file.c
> >> +++ b/fs/f2fs/file.c
> >> @@ -2260,7 +2260,9 @@ static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg)
> >> set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
> >> break;
> >> case F2FS_GOING_DOWN_METAFLUSH:
> >> + mutex_lock(&sbi->cp_mutex);
> >> f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_META_IO);
> >> + mutex_unlock(&sbi->cp_mutex);
> >> f2fs_stop_checkpoint(sbi, false);
> >> set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
> >> break;
> >> --
> >> 2.18.0.rc1
> > .
> >