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Date:	Fri, 01 Nov 2013 08:35:50 +0800
From:	Bob Liu <bob.liu@...cle.com>
To:	Olav Haugan <ohaugan@...eaurora.org>
CC:	Luigi Semenzato <semenzato@...gle.com>,
	Minchan Kim <minchan@...nel.org>,
	Seth Jennings <sjenning@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: zram/zsmalloc issues in very low memory conditions

Hi Olav,

On 11/01/2013 07:34 AM, Olav Haugan wrote:
> Hi Luigi,
> 
> On 10/24/2013 6:12 PM, Luigi Semenzato wrote:
>> On Thu, Oct 24, 2013 at 5:35 PM, Olav Haugan <ohaugan@...eaurora.org> wrote:
>>> Hi Bob, Luigi,
>>>
>>> On 10/23/2013 5:55 PM, Bob Liu wrote:
>>>>
>>>> On 10/24/2013 05:51 AM, Olav Haugan wrote:
>>>
>>>> By the way, could you take a try with zswap? Which can write pages to
>>>> real swap device if compressed pool is full.
>>>
>>> zswap might not be feasible in all cases if you only have flash as
>>> backing storage.
>>
>> Zswap can be configured to run without a backing storage.
>>
> 
> I was under the impression that zswap requires a backing storage. Can
> you elaborate on how to configure zswap to not need a backing storage?
> 

AFAIK, currently zswap can't be used without a backing storage.
Perhaps you can take a try by creating a swap device backed by a file on
storage.

-- 
Regards,
-Bob
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