From: Rik van Riel <riel@redhat.com>
To: Satoru Moriya <satoru.moriya@hds.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@gmail.com>,
Jerome Marchand <jmarchan@redhat.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
"jweiner@redhat.com" <jweiner@redhat.com>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"lwoodman@redhat.com" <lwoodman@redhat.com>,
"dle-develop@lists.sourceforge.net"
<dle-develop@lists.sourceforge.net>,
Seiji Aguchi <seiji.aguchi@hds.com>
Subject: Re: [RFC][PATCH] avoid swapping out with swappiness==0
Date: Sat, 12 May 2012 18:21:10 -0400 [thread overview]
Message-ID: <4FAEE256.7000403@redhat.com> (raw)
In-Reply-To: <65795E11DBF1E645A09CEC7EAEE94B9C01583B4D7C@USINDEVS02.corp.hds.com>
On 05/11/2012 05:11 PM, Satoru Moriya wrote:
> On 04/20/2012 08:21 PM, Satoru Moriya wrote:
>> Ah yes, it is not so small now.
>> On 4GB server, without THP min_free_kbytes is 8113 but with THP it is
>> 67584.
>>
>> How about using low watermark or min watermark?
>> Are they still big?
>>
>> ...or should we use other value?
>
> What do you think of the idea above?
I believe that using the high watermark is just fine.
We want to start swapping, before the page cache is so
small that we start thrashing from that.
> So, I propose that we start with applying this patch first
> and then discuss/improve the threshold.
>
> The patch may not be perfect but, at least, we can improve
> the kernel behavior in the enough filebacked memory case
> with this patch. I believe it's better than nothing.
Agreed.
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WARNING: multiple messages have this Message-ID (diff)
From: Rik van Riel <riel@redhat.com>
To: Satoru Moriya <satoru.moriya@hds.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@gmail.com>,
Jerome Marchand <jmarchan@redhat.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
"jweiner@redhat.com" <jweiner@redhat.com>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"lwoodman@redhat.com" <lwoodman@redhat.com>,
"dle-develop@lists.sourceforge.net"
<dle-develop@lists.sourceforge.net>,
Seiji Aguchi <seiji.aguchi@hds.com>
Subject: Re: [RFC][PATCH] avoid swapping out with swappiness==0
Date: Sat, 12 May 2012 18:21:10 -0400 [thread overview]
Message-ID: <4FAEE256.7000403@redhat.com> (raw)
In-Reply-To: <65795E11DBF1E645A09CEC7EAEE94B9C01583B4D7C@USINDEVS02.corp.hds.com>
On 05/11/2012 05:11 PM, Satoru Moriya wrote:
> On 04/20/2012 08:21 PM, Satoru Moriya wrote:
>> Ah yes, it is not so small now.
>> On 4GB server, without THP min_free_kbytes is 8113 but with THP it is
>> 67584.
>>
>> How about using low watermark or min watermark?
>> Are they still big?
>>
>> ...or should we use other value?
>
> What do you think of the idea above?
I believe that using the high watermark is just fine.
We want to start swapping, before the page cache is so
small that we start thrashing from that.
> So, I propose that we start with applying this patch first
> and then discuss/improve the threshold.
>
> The patch may not be perfect but, at least, we can improve
> the kernel behavior in the enough filebacked memory case
> with this patch. I believe it's better than nothing.
Agreed.
--
All rights reversed
next prev parent reply other threads:[~2012-05-12 22:21 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-02 17:36 [RFC][PATCH] avoid swapping out with swappiness==0 Satoru Moriya
2012-03-02 17:36 ` Satoru Moriya
2012-03-02 22:47 ` Rik van Riel
2012-03-02 22:47 ` Rik van Riel
2012-03-02 23:43 ` Satoru Moriya
2012-03-02 23:43 ` Satoru Moriya
2012-03-03 2:29 ` Hillf Danton
2012-03-03 2:29 ` Hillf Danton
2012-03-04 6:57 ` Minchan Kim
2012-03-04 6:57 ` Minchan Kim
2012-03-05 21:38 ` Satoru Moriya
2012-03-05 21:38 ` Satoru Moriya
2012-03-05 13:49 ` Rik van Riel
2012-03-05 13:49 ` Rik van Riel
2012-03-05 21:56 ` Johannes Weiner
2012-03-05 21:56 ` Johannes Weiner
2012-03-07 17:19 ` KOSAKI Motohiro
2012-03-07 17:19 ` KOSAKI Motohiro
2012-03-07 18:18 ` Satoru Moriya
2012-03-07 18:18 ` Satoru Moriya
2012-03-30 22:44 ` Satoru Moriya
2012-03-30 22:44 ` Satoru Moriya
2012-04-02 17:10 ` KOSAKI Motohiro
2012-04-02 17:10 ` KOSAKI Motohiro
2012-04-03 11:25 ` Jerome Marchand
2012-04-03 11:25 ` Jerome Marchand
2012-04-03 15:15 ` Satoru Moriya
2012-04-03 15:15 ` Satoru Moriya
2012-04-04 17:38 ` KOSAKI Motohiro
2012-04-04 17:38 ` KOSAKI Motohiro
2012-04-21 0:21 ` Satoru Moriya
2012-04-21 0:21 ` Satoru Moriya
2012-05-11 21:11 ` Satoru Moriya
2012-05-11 21:11 ` Satoru Moriya
2012-05-12 22:21 ` Rik van Riel [this message]
2012-05-12 22:21 ` Rik van Riel
2012-04-24 8:20 ` Richard Davies
2012-04-24 8:20 ` Richard Davies
2012-04-24 22:14 ` Satoru Moriya
2012-04-24 22:14 ` Satoru Moriya
2012-04-26 14:26 ` Richard Davies
2012-04-26 14:26 ` Richard Davies
2012-04-26 15:41 ` KOSAKI Motohiro
2012-04-26 15:41 ` KOSAKI Motohiro
2012-05-07 20:09 ` Rik van Riel
2012-05-07 20:09 ` Rik van Riel
2012-05-08 0:05 ` Minchan Kim
2012-05-08 0:05 ` Minchan Kim
2012-05-21 7:12 ` Richard Davies
2012-05-21 7:12 ` Richard Davies
2012-05-21 13:39 ` Satoru Moriya
2012-05-21 13:39 ` Satoru Moriya
2012-04-26 14:50 ` Christoph Lameter
2012-04-26 14:50 ` Christoph Lameter
2012-04-26 15:37 ` KOSAKI Motohiro
2012-04-26 15:37 ` KOSAKI Motohiro
2012-04-26 16:08 ` Richard Davies
2012-04-26 16:08 ` Richard Davies
2012-04-26 18:20 ` Christoph Lameter
2012-04-26 18:20 ` Christoph Lameter
2012-04-27 13:55 ` Rik van Riel
2012-04-27 13:55 ` Rik van Riel
2012-05-07 20:11 ` Rik van Riel
2012-05-07 20:11 ` Rik van Riel
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