From: Nitin Gupta Subject: Re: [PATCH V3 3/8] Cleancache: core ops functions and configuration Date: Wed, 07 Jul 2010 06:32:56 +0530 Message-ID: <4C33D240.80102@vflare.org> References: <20100621231939.GA19505@ca-server1.us.oracle.com> <1277223988.9782.20.camel@nimitz> <20100706205121.GA32627@phenom.dumpdata.com> Reply-To: ngupta@vflare.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Dave Hansen , Dan Magenheimer , chris.mason@oracle.com, viro@zeniv.linux.org.uk, akpm@linux-foundation.org, adilger@Sun.COM, tytso@mit.edu, mfasheh@suse.com, joel.becker@oracle.com, matthew@wil.cx, linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, ocfs2-devel@oss.oracle.com, linux-mm@kvack.org, jeremy@goop.org, JBeulich@novell.com, kurt.hackel@oracle.com, npiggin@suse.de, dave.mccracken@oracle.com, riel@redhat.com, avi@redhat.com To: Konrad Rzeszutek Wilk Return-path: Received: from mail-px0-f174.google.com ([209.85.212.174]:45276 "EHLO mail-px0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753535Ab0GGBCh (ORCPT ); Tue, 6 Jul 2010 21:02:37 -0400 In-Reply-To: <20100706205121.GA32627@phenom.dumpdata.com> Sender: linux-ext4-owner@vger.kernel.org List-ID: On 07/07/2010 02:21 AM, Konrad Rzeszutek Wilk wrote: > On Tue, Jun 22, 2010 at 09:26:28AM -0700, Dave Hansen wrote: >> 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 >>> +#include >>> + >>> +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? > > Dan, > > Can you reference with a link or a git branch the patches that utilize > this? > > And also mention that in the 0/X patch so that folks can reference your > cleancache implementation? > > FYI. I am working on 'zcache' which uses cleancache_ops to provide page cache compression support. I will be posting it to LKML before end of next week. Thanks, Nitin