Date: Sun, 4 Jan 2004 16:23:01 -0800
From: Andrew Morton <akpm@osdl.org>
To: Mike Fedyk <mfedyk@matchmail.com>
Cc: ornati@lycos.it, gandalf@wlug.westbo.se, linuxram@us.ibm.com,
       linux-kernel@vger.kernel.org
Subject: Re: Buffer and Page cache coherent? was: Strange IDE performance
 change in 2.6.1-rc1 (again)
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Mike Fedyk <mfedyk@matchmail.com> wrote:
>
> So in what way is the buffer cache coherent with the pagecache?
> 

There is no "buffer cache" in Linux.  There is a pagecache for /etc/passwd
and there is a pagecache for /dev/hda1.  They are treated pretty much
identically.  The kernel attaches buffer_heads to those pagecache pages
when needed - generally when it wants to deal with individual disk blocks.

>  Any progress on that pagecache coherent block relocation patch you had for
>  ext3? :)

No.
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