Re: [PATCH] f2fs: guarantee to write dirty data when enabling checkpoint back

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On 09/09, Greg KH wrote:
> On Wed, Sep 08, 2021 at 10:28:37PM -0700, Jaegeuk Kim wrote:
> > On 09/09, Greg KH wrote:
> > > On Wed, Sep 08, 2021 at 03:00:20PM -0700, Jaegeuk Kim wrote:
> > > > From: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
> > > > 
> > > > commit dddd3d65293a52c2c3850c19b1e5115712e534d8 upstream.
> > > > 
> > > > We must flush all the dirty data when enabling checkpoint back. Let's guarantee
> > > > that first by adding a retry logic on sync_inodes_sb(). In addition to that,
> > > > this patch adds to flush data in fsync when checkpoint is disabled, which can
> > > > mitigate the sync_inodes_sb() failures in advance.
> > > > 
> > > > Reviewed-by: Chao Yu <chao@xxxxxxxxxx>
> > > > Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
> > > > ---
> > > >  fs/f2fs/file.c  |  5 ++---
> > > >  fs/f2fs/super.c | 11 ++++++++++-
> > > >  2 files changed, 12 insertions(+), 4 deletions(-)
> > > 
> > > What stable kernel(s) are you wanting to have this backported to?
> > 
> > 5.10 please.
> 
> Why would you want to skip 5.14.y and 5.13.y?  You never want anyone to
> upgrade stable kernel releases and have a regression.

I was just looking at the essential kernel version, since the fix is only
related to checkpoint=disable feature used in android only. Feel free to
merge it into any stable kernels if you want.

> 
> thanks,
> 
> greg k-h



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