Message-ID: <518C2106.3030402@sr71.net>
Date: Thu, 09 May 2013 15:19:50 -0700
From: Dave Hansen <dave@sr71.net>
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To: Seth Jennings <sjenning@linux.vnet.ibm.com>
CC: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
        akpm@linux-foundation.org, mgorman@suse.de, tim.c.chen@linux.intel.com
Subject: Re: [RFC][PATCH 1/7] defer clearing of page_private() for swap cache
 pages
References: <20130507211954.9815F9D1@viggo.jf.intel.com> <20130507211955.7DF88A4F@viggo.jf.intel.com> <20130509220739.GA14840@cerebellum>
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On 05/09/2013 03:07 PM, Seth Jennings wrote:
> mm/memcontrol:4111
> VM_BUG_ON(PageSwapCache(page));
> 
> Seems that mem_cgroup_uncharge_swapcache, somewhat ironically expects the
> SwapCache flag to be unset already.
> 
> Fix might be a simple as removing that VM_BUG_ON() but there might be more to
> it.  There usually is :)

Yeah, I wasn't testing with cgroups around.  I'll go do that and see
what I come up with.
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