linux-kernel - Re: [f2fs-dev] [PATCH] f2fs: remove redundant check in f2fs_force_buffered

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Date:   Mon, 4 May 2020 20:23:58 -0700
From:   Jaegeuk Kim <jaegeuk@...nel.org>
To:     Chao Yu <chao@...nel.org>
Cc:     linux-kernel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net, kernel-team@...roid.com
Subject: Re: [f2fs-dev] [PATCH] f2fs: remove redundant check in
 f2fs_force_buffered_io

On 05/05, Chao Yu wrote:
> On 2020-5-4 22:35, Jaegeuk Kim wrote:
> > From: Daeho Jeong <daehojeong@...gle.com>
> > 
> > We already checked whether the file is compressed or not in
> > f2fs_post_read_required(). So removed f2fs_compressed_file()
> > in f2fs_force_buffered_io().
> 
> Agreed, since I have sent similar patch before:
> 
> https://lkml.org/lkml/2020/3/24/1819

Heh, as I couldn't find yours, I was actually waiting for you to point out. :)

> 
> Just want to know what's the change of backport concern now.

Old ICE support had to decouple f2fs_post_read_required() and
f2fs_forced_buffered_io(). Now, I decide to manage this as we
need to manage this for one kernel version only.

Thanks,

> 
> Thanks,
> 
> > 
> > Signed-off-by: Daeho Jeong <daehojeong@...gle.com>
> > Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
> > ---
> >  fs/f2fs/f2fs.h | 2 --
> >  1 file changed, 2 deletions(-)
> > 
> > diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
> > index 6b7b963641696..01a00fc808361 100644
> > --- a/fs/f2fs/f2fs.h
> > +++ b/fs/f2fs/f2fs.h
> > @@ -4064,8 +4064,6 @@ static inline bool f2fs_force_buffered_io(struct inode *inode,
> >  		return true;
> >  	if (f2fs_is_multi_device(sbi))
> >  		return true;
> > -	if (f2fs_compressed_file(inode))
> > -		return true;
> >  	/*
> >  	 * for blkzoned device, fallback direct IO to buffered IO, so
> >  	 * all IOs can be serialized by log-structured write.
> >