linux-ext4 - Re: [PATCH V3 3/8] Cleancache: core ops functions and configuration

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Message-ID: <1277223988.9782.20.camel@nimitz>
Date:	Tue, 22 Jun 2010 09:26:28 -0700
From:	Dave Hansen <dave@...1.net>
To:	Dan Magenheimer <dan.magenheimer@...cle.com>
Cc:	chris.mason@...cle.com, viro@...iv.linux.org.uk,
	akpm@...ux-foundation.org, adilger@....COM, tytso@....edu,
	mfasheh@...e.com, joel.becker@...cle.com, matthew@....cx,
	linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org,
	ocfs2-devel@....oracle.com, linux-mm@...ck.org, ngupta@...are.org,
	jeremy@...p.org, JBeulich@...ell.com, kurt.hackel@...cle.com,
	npiggin@...e.de, dave.mccracken@...cle.com, riel@...hat.com,
	avi@...hat.com, konrad.wilk@...cle.com
Subject: Re: [PATCH V3 3/8] Cleancache: core ops functions and configuration

On Mon, 2010-06-21 at 16:19 -0700, Dan Magenheimer wrote:
> --- linux-2.6.35-rc2/include/linux/cleancache.h 1969-12-31 17:00:00.000000000 -0700
> +++ linux-2.6.35-rc2-cleancache/include/linux/cleancache.h      2010-06-21 14:45:18.000000000 -0600
> @@ -0,0 +1,88 @@
> +#ifndef _LINUX_CLEANCACHE_H
> +#define _LINUX_CLEANCACHE_H
> +
> +#include <linux/fs.h>
> +#include <linux/mm.h>
> +
> +struct cleancache_ops {
> +       int (*init_fs)(size_t);
> +       int (*init_shared_fs)(char *uuid, size_t);
> +       int (*get_page)(int, ino_t, pgoff_t, struct page *);
> +       void (*put_page)(int, ino_t, pgoff_t, struct page *);
> +       void (*flush_page)(int, ino_t, pgoff_t);
> +       void (*flush_inode)(int, ino_t);
> +       void (*flush_fs)(int);
> +};
> + 

How would someone go about testing this code?  Is there an example
cleancache implementation?

-- Dave

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