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Re: Linux page cache doubt

To: Steve Lord <lord@xxxxxxx>
Subject: Re: Linux page cache doubt
From: Christoph Hellwig <hch@xxxxxxxxxx>
Date: Thu, 25 Oct 2001 08:37:41 +0200
Cc: Arun Ramakrishnan <ramakria@xxxxxxxxxxxxxxxxxx>, linux-xfs@xxxxxxxxxxx
In-reply-to: <200110242236.f9OMagj06647@xxxxxxxxxxxxxxxxxxxx>; from lord@xxxxxxx on Wed, Oct 24, 2001 at 05:36:41PM -0500
References: <ramakria@xxxxxxxxxxxxxxxxxx> <200110242236.f9OMagj06647@xxxxxxxxxxxxxxxxxxxx>
Sender: owner-linux-xfs@xxxxxxxxxxx
User-agent: Mutt/1.2.5i
On Wed, Oct 24, 2001 at 05:36:41PM -0500, Steve Lord wrote:
> Hi Arun, well filesystem I/O is divided into two chunks - file data
> which is definitely page cache based, and metadata which is done through
> various means depending on:
> 
>       o which kernel you are running
>       o which filesystem
> 
> All filesystems that I am aware of except for XFS use buffer heads and the
> block cache for metadata I/O.

JFS uses the pagecache for all I/O - for metadata they have an additional
'metapage' abstraction.

        Christoph

-- 
Of course it doesn't work. We've performed a software upgrade.


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