linux-kernel - Re: [PATCH 02/10] zcache: fix refcount leak

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Message-ID: <4FE0DBDD.2090005@linux.vnet.ibm.com>
Date:	Tue, 19 Jun 2012 15:06:53 -0500
From:	Seth Jennings <sjenning@...ux.vnet.ibm.com>
To:	Dan Magenheimer <dan.magenheimer@...cle.com>
CC:	Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>, linux-mm@...ck.org,
	Konrad Wilk <konrad.wilk@...cle.com>,
	Nitin Gupta <ngupta@...are.org>
Subject: Re: [PATCH 02/10] zcache: fix refcount leak

On 06/19/2012 02:49 PM, Dan Magenheimer wrote:

> My preference would be to fix it the opposite way, by
> checking and ignoring zcache_host in zcache_put_pool.
> The ref-counting is to ensure that a client isn't
> accidentally destroyed while in use (for multiple-client
> users such as ramster and kvm) and since zcache_host is a static
> struct, it should never be deleted so need not be ref-counted.


If we do that, we'll need to comment it.  If we don't, it won't be
obvious why we are refcounting every zcache client except one.  It'll
look like a bug.

--
Seth

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