linux-kernel - Re: zram/zsmalloc issues in very low memory conditions

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Message-ID: <CAA25o9RwKbjDo5knY9ZFvmVFKDCwE2Gu3fmz2GwMFjBO2f-V=Q@mail.gmail.com>
Date:	Thu, 31 Oct 2013 17:27:16 -0700
From:	Luigi Semenzato <semenzato@...gle.com>
To:	Olav Haugan <ohaugan@...eaurora.org>,
	Stephen Barber <smbarber@...nford.edu>
Cc:	Bob Liu <bob.liu@...cle.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

[apologies for the previous HTML email]

Hi Olav,

I haven't personally done it.  Seth outlines the configuration in this thread:

http://thread.gmane.org/gmane.linux.kernel.mm/105378/focus=105543

Stephen, can you add more detail from your experience?

Thanks!


On Thu, Oct 31, 2013 at 4:34 PM, Olav Haugan <ohaugan@...eaurora.org> 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?
>
>
> Olav Haugan
>
> --
> The Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
> hosted by The Linux Foundation
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