From: Rik van Riel <riel@redhat.com>
To: Colin Walters <walters@verbum.org>
Cc: Minchan Kim <minchan@kernel.org>, linux-mm <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>,
leonid.moiseichuk@nokia.com, kamezawa.hiroyu@jp.fujitsu.com,
penberg@kernel.org, mel@csn.ul.ie, rientjes@google.com,
KOSAKI Motohiro <kosaki.motohiro@gmail.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Marcelo Tosatti <mtosatti@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Ronen Hod <rhod@redhat.com>
Subject: Re: [RFC 0/3] low memory notify
Date: Tue, 17 Jan 2012 11:44:32 -0500 [thread overview]
Message-ID: <4F15A570.8090604@redhat.com> (raw)
In-Reply-To: <1326811093.3467.41.camel@lenny>
On 01/17/2012 09:38 AM, Colin Walters wrote:
> How does this relate to the existing cgroups memory notifications? See
> Documentation/cgroups/memory.txt under "10. OOM Control"
> As far as the desktop goes, I want to get notified if we're going to hit
> swap, not if we're close to exhausting the total of RAM+swap. While
> swap may make sense for servers that care about throughput mainly, I
> care a lot about latency.
You just answered your own question :)
This code is indeed meant to avoid/reduce swap use and
improve userspace latencies.
Minchan posted a very simple example patch set, so we
can get an idea in what direction people would want
the code to go. This often beats working on complex
code for weeks, and then having people tell you they
wanted something else :)
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WARNING: multiple messages have this Message-ID (diff)
From: Rik van Riel <riel@redhat.com>
To: Colin Walters <walters@verbum.org>
Cc: Minchan Kim <minchan@kernel.org>, linux-mm <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>,
leonid.moiseichuk@nokia.com, kamezawa.hiroyu@jp.fujitsu.com,
penberg@kernel.org, mel@csn.ul.ie, rientjes@google.com,
KOSAKI Motohiro <kosaki.motohiro@gmail.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Marcelo Tosatti <mtosatti@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Ronen Hod <rhod@redhat.com>
Subject: Re: [RFC 0/3] low memory notify
Date: Tue, 17 Jan 2012 11:44:32 -0500 [thread overview]
Message-ID: <4F15A570.8090604@redhat.com> (raw)
In-Reply-To: <1326811093.3467.41.camel@lenny>
On 01/17/2012 09:38 AM, Colin Walters wrote:
> How does this relate to the existing cgroups memory notifications? See
> Documentation/cgroups/memory.txt under "10. OOM Control"
> As far as the desktop goes, I want to get notified if we're going to hit
> swap, not if we're close to exhausting the total of RAM+swap. While
> swap may make sense for servers that care about throughput mainly, I
> care a lot about latency.
You just answered your own question :)
This code is indeed meant to avoid/reduce swap use and
improve userspace latencies.
Minchan posted a very simple example patch set, so we
can get an idea in what direction people would want
the code to go. This often beats working on complex
code for weeks, and then having people tell you they
wanted something else :)
--
All rights reversed
next prev parent reply other threads:[~2012-01-17 16:44 UTC|newest]
Thread overview: 124+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-17 8:13 [RFC 0/3] low memory notify Minchan Kim
2012-01-17 8:13 ` Minchan Kim
2012-01-17 8:13 ` [RFC 1/3] /dev/low_mem_notify Minchan Kim
2012-01-17 8:13 ` Minchan Kim
2012-01-17 9:27 ` Pekka Enberg
2012-01-17 9:27 ` Pekka Enberg
2012-01-17 16:35 ` Rik van Riel
2012-01-17 16:35 ` Rik van Riel
2012-01-17 18:51 ` Pekka Enberg
2012-01-17 18:51 ` Pekka Enberg
2012-01-17 19:30 ` Rik van Riel
2012-01-17 19:30 ` Rik van Riel
2012-01-17 19:49 ` Pekka Enberg
2012-01-17 19:49 ` Pekka Enberg
2012-01-17 19:54 ` Pekka Enberg
2012-01-17 19:54 ` Pekka Enberg
2012-01-17 19:57 ` Pekka Enberg
2012-01-17 19:57 ` Pekka Enberg
2012-01-17 23:20 ` Minchan Kim
2012-01-17 23:20 ` Minchan Kim
2012-01-18 7:16 ` Pekka Enberg
2012-01-18 7:16 ` Pekka Enberg
2012-01-18 7:49 ` Minchan Kim
2012-01-18 7:49 ` Minchan Kim
2012-01-18 9:06 ` leonid.moiseichuk
2012-01-18 9:06 ` leonid.moiseichuk
2012-01-18 9:15 ` Pekka Enberg
2012-01-18 9:15 ` Pekka Enberg
2012-01-18 9:41 ` leonid.moiseichuk
2012-01-18 9:41 ` leonid.moiseichuk
2012-01-18 10:40 ` Pekka Enberg
2012-01-18 10:40 ` Pekka Enberg
2012-01-18 10:44 ` leonid.moiseichuk
2012-01-18 10:44 ` leonid.moiseichuk
2012-01-18 23:34 ` Ronen Hod
2012-01-18 23:34 ` Ronen Hod
2012-01-19 7:25 ` Pekka Enberg
2012-01-19 7:25 ` Pekka Enberg
2012-01-19 9:05 ` Ronen Hod
2012-01-19 9:05 ` Ronen Hod
2012-01-19 9:10 ` Pekka Enberg
2012-01-19 9:10 ` Pekka Enberg
2012-01-19 9:20 ` Ronen Hod
2012-01-19 9:20 ` Ronen Hod
2012-01-19 10:53 ` leonid.moiseichuk
2012-01-19 10:53 ` leonid.moiseichuk
2012-01-19 11:07 ` Pekka Enberg
2012-01-19 11:07 ` Pekka Enberg
2012-01-19 11:54 ` leonid.moiseichuk
2012-01-19 11:54 ` leonid.moiseichuk
2012-01-19 11:59 ` Pekka Enberg
2012-01-19 11:59 ` Pekka Enberg
2012-01-19 12:06 ` Pekka Enberg
2012-01-19 12:06 ` Pekka Enberg
2012-01-24 15:38 ` Marcelo Tosatti
2012-01-24 15:38 ` Marcelo Tosatti
2012-01-24 16:08 ` Ronen Hod
2012-01-24 16:08 ` Ronen Hod
2012-01-24 18:10 ` Marcelo Tosatti
2012-01-24 18:10 ` Marcelo Tosatti
2012-01-25 8:52 ` Ronen Hod
2012-01-25 8:52 ` Ronen Hod
2012-01-25 10:12 ` Marcelo Tosatti
2012-01-25 10:12 ` Marcelo Tosatti
2012-01-25 10:48 ` Ronen Hod
2012-01-25 10:48 ` Ronen Hod
2012-01-26 16:17 ` Marcelo Tosatti
2012-01-26 16:17 ` Marcelo Tosatti
2012-01-24 16:10 ` Pekka Enberg
2012-01-24 16:10 ` Pekka Enberg
2012-01-24 18:29 ` Marcelo Tosatti
2012-01-24 18:29 ` Marcelo Tosatti
2012-01-25 8:19 ` leonid.moiseichuk
2012-01-25 8:19 ` leonid.moiseichuk
2012-01-19 7:34 ` Pekka Enberg
2012-01-19 7:34 ` Pekka Enberg
2012-01-24 16:22 ` Arnd Bergmann
2012-01-24 16:22 ` Arnd Bergmann
2012-01-18 14:30 ` Rik van Riel
2012-01-18 14:30 ` Rik van Riel
2012-01-18 15:29 ` Pekka Enberg
2012-01-18 15:29 ` Pekka Enberg
2012-01-24 15:40 ` Marcelo Tosatti
2012-01-24 15:40 ` Marcelo Tosatti
2012-01-24 16:01 ` Pekka Enberg
2012-01-24 16:01 ` Pekka Enberg
2012-01-24 16:25 ` Arnd Bergmann
2012-01-24 16:25 ` Arnd Bergmann
2012-01-24 18:32 ` Marcelo Tosatti
2012-01-24 18:32 ` Marcelo Tosatti
2012-01-24 21:57 ` Jonathan Corbet
2012-01-24 21:57 ` Jonathan Corbet
2012-01-17 9:45 ` Pekka Enberg
2012-01-17 9:45 ` Pekka Enberg
2012-01-17 8:13 ` [RFC 2/3] vmscan hook Minchan Kim
2012-01-17 8:13 ` Minchan Kim
2012-01-17 8:39 ` KAMEZAWA Hiroyuki
2012-01-17 8:39 ` KAMEZAWA Hiroyuki
2012-01-17 9:13 ` Minchan Kim
2012-01-17 9:13 ` Minchan Kim
2012-01-17 10:05 ` KAMEZAWA Hiroyuki
2012-01-17 10:05 ` KAMEZAWA Hiroyuki
2012-01-17 23:08 ` Minchan Kim
2012-01-17 23:08 ` Minchan Kim
2012-01-18 0:18 ` KAMEZAWA Hiroyuki
2012-01-18 0:18 ` KAMEZAWA Hiroyuki
2012-01-18 14:17 ` Rik van Riel
2012-01-18 14:17 ` Rik van Riel
2012-01-19 2:25 ` KAMEZAWA Hiroyuki
2012-01-19 2:25 ` KAMEZAWA Hiroyuki
2012-01-19 14:42 ` Rik van Riel
2012-01-19 14:42 ` Rik van Riel
2012-01-20 0:24 ` KAMEZAWA Hiroyuki
2012-01-20 0:24 ` KAMEZAWA Hiroyuki
2012-01-17 8:13 ` [RFC 3/3] test program Minchan Kim
2012-01-17 8:13 ` Minchan Kim
2012-01-17 14:38 ` [RFC 0/3] low memory notify Colin Walters
2012-01-17 14:38 ` Colin Walters
2012-01-17 15:04 ` Pekka Enberg
2012-01-17 15:04 ` Pekka Enberg
2012-01-17 16:44 ` Rik van Riel [this message]
2012-01-17 16:44 ` Rik van Riel
2012-01-17 17:16 ` Olof Johansson
2012-01-17 17:16 ` Olof Johansson
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