linux-kernel - Re: [PATCH 0/4] cleancache: remove limit on the number of cleancache enabled filesystems

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Message-ID: <20150223161222.GD30733@l.oracle.com>
Date:	Mon, 23 Feb 2015 11:12:22 -0500
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	Vladimir Davydov <vdavydov@...allels.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	David Vrabel <david.vrabel@...rix.com>,
	Mark Fasheh <mfasheh@...e.com>,
	Joel Becker <jlbec@...lplan.org>,
	Stefan Hengelein <ilendir@...glemail.com>,
	Florian Schmaus <fschmaus@...il.com>,
	Andor Daam <andor.daam@...glemail.com>,
	Dan Magenheimer <dan.magenheimer@...cle.com>,
	Bob Liu <lliubbo@...il.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/4] cleancache: remove limit on the number of cleancache
 enabled filesystems

On Sun, Feb 22, 2015 at 09:31:51PM +0300, Vladimir Davydov wrote:
> Hi,
> 
> Currently, maximal number of cleancache enabled filesystems equals 32,
> which is insufficient nowadays, because a Linux host can have hundreds
> of containers on board, each of which might want its own filesystem.
> This patch set targets at removing this limitation - see patch 4 for
> more details. Patches 1-3 prepare the code for this change.

Hey Vladimir,

Thank you for posting these patches. I was wondering if you had
run through some of the different combinations that you can
load the filesystems/tmem drivers in random order? The #4 patch
deleted a nice chunk of documentation that outlines the different
combinations.

Thank you!
> 
> Thanks,
> 
> Vladimir Davydov (4):
>   ocfs2: copy fs uuid to superblock
>   cleancache: zap uuid arg of cleancache_init_shared_fs
>   cleancache: forbid overriding cleancache_ops
>   cleancache: remove limit on the number of cleancache enabled
>     filesystems
> 
>  Documentation/vm/cleancache.txt |    4 +-
>  drivers/xen/tmem.c              |   16 ++-
>  fs/ocfs2/super.c                |    4 +-
>  fs/super.c                      |    2 +-
>  include/linux/cleancache.h      |   13 +-
>  mm/cleancache.c                 |  270 +++++++++++----------------------------
>  6 files changed, 94 insertions(+), 215 deletions(-)
> 
> -- 
> 1.7.10.4
> 
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