From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch@infradead.org>
Subject: Re: which dentry a page belongs to
Date: Sat, 24 Apr 2004 10:20:56 +0100
Sender: linux-fsdevel-owner@vger.kernel.org
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Cc: Shaya Potter <spotter@cs.columbia.edu>,
	Jamie Lokier <jamie@shareable.org>,
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To: Jan Hudec <bulb@ucw.cz>
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In-Reply-To: <20040424084445.GB7119@vagabond>; from bulb@ucw.cz on Sat, Apr 24, 2004 at 10:44:46AM +0200
List-Id: linux-fsdevel.vger.kernel.org

On Sat, Apr 24, 2004 at 10:44:46AM +0200, Jan Hudec wrote:
> On Fri, Apr 23, 2004 at 17:37:38 +0100, Christoph Hellwig wrote:
> > in 2.4 writepage is always the result of data dirtied by mmap.  In 2.6 it's
> > also for use for data dirtied by write.  Even in 2.4 there's no gurantee
> > the mapping that dirtied the page still exists when the page is written out
> > by the VM.
> 
> No, It's the same in 2.4 and 2.6 -- both may use writepage for write
> (depends on how you implement your commit_write).

Well, okay.  At least xfs uses writepage and some network filesystems do
aswell.  The filesystems using generic fs/buffer.c routines don't use
writepage at least..