From: Stephen Barber <smbarber@stanford.edu>
To: Luigi Semenzato <semenzato@google.com>
Cc: Olav Haugan <ohaugan@codeaurora.org>,
Bob Liu <bob.liu@oracle.com>, Minchan Kim <minchan@kernel.org>,
Seth Jennings <sjenning@linux.vnet.ibm.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: zram/zsmalloc issues in very low memory conditions
Date: Sat, 2 Nov 2013 00:40:48 -0700 [thread overview]
Message-ID: <CA+DLN_AH9PVkywCpKWHJ1568O0MsjwZZw2zXuPn55msodO0m5w@mail.gmail.com> (raw)
In-Reply-To: <CAA25o9RwKbjDo5knY9ZFvmVFKDCwE2Gu3fmz2GwMFjBO2f-V=Q@mail.gmail.com>
I did get zswap working without a backing store, using Bob's patches
from http://thread.gmane.org/gmane.linux.kernel.mm/105627/focus=105642
applied to 3.11-rc6, The major issue we had with it was that i915
graphics buffers were getting corrupted somehow, which wasn't a
problem with zram on the same kernel version. I'm sure with a little
more investigation that problem could be fixed, though, and I don't
think there were any other major problems with it in our (admittedly
not very exhaustive) testing of those patches.
Hope that helps,
Steve Barber
On Thu, Oct 31, 2013 at 5:27 PM, Luigi Semenzato <semenzato@google.com> wrote:
> [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@codeaurora.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@codeaurora.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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next prev parent reply other threads:[~2013-11-02 7:40 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-23 21:51 Olav Haugan
2013-10-23 22:14 ` Luigi Semenzato
2013-10-23 22:17 ` Luigi Semenzato
2013-10-24 0:55 ` Bob Liu
2013-10-25 0:35 ` Olav Haugan
2013-10-25 1:12 ` Luigi Semenzato
2013-10-31 23:34 ` Olav Haugan
2013-11-01 0:25 ` Luigi Semenzato
2013-11-01 0:27 ` Luigi Semenzato
2013-11-02 7:40 ` Stephen Barber [this message]
2013-11-01 0:35 ` Bob Liu
2013-10-25 2:59 ` Bob Liu
2013-10-24 10:42 ` Weijie Yang
2013-10-25 9:19 ` Minchan Kim
2013-11-02 0:59 ` Olav Haugan
2013-11-02 2:50 ` Bob Liu
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