linux-kernel - Re: [PATCH 1/1] fs/mpage.c: forgotten WRITE

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Message-ID: <20140314150850.GA5175@quack.suse.cz>
Date:	Fri, 14 Mar 2014 16:08:50 +0100
From:	Jan Kara <jack@...e.cz>
To:	Tejun Heo <tj@...nel.org>
Cc:	Jan Kara <jack@...e.cz>, Roman Peniaev <r.peniaev@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	Jens Axboe <axboe@...nel.dk>
Subject: Re: [PATCH 1/1] fs/mpage.c: forgotten WRITE_SYNC in case of data
 integrity write

On Fri 14-03-14 10:54:30, Tejun Heo wrote:
> On Fri, Mar 14, 2014 at 03:52:15PM +0100, Jan Kara wrote:
> >   Well, for ext2, you can use ext4 kernel driver which takes care of
> > REQ_FLUSH properly. For fat, you'll need to fix the fs...
> 
> This is a bit surprising tho.  Were we always like this?  We never had
> even stupid "flush down everything and sync"?  Or is this something we
> broke while morphing flush implementation several times in the past
> years?
  It has been always like this. We could add some sending of REQ_FLUSH into
generic code - like generic_file_fsync() and some similar helper for
->sync_fs(). Just someone has to do it...

								Honza
-- 
Jan Kara <jack@...e.cz>
SUSE Labs, CR
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