From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
To: jmarchan@redhat.com
Cc: bsingharora@gmail.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [RFC PATCH V2] Enforce RSS+Swap rlimit
Date: Tue, 15 Nov 2011 19:02:49 -0500 [thread overview]
Message-ID: <4EC2FDA9.6050401@jp.fujitsu.com> (raw)
In-Reply-To: <4EC264AA.30306@redhat.com>
On 11/15/2011 8:10 AM, Jerome Marchand wrote:
>
> Change since V1: rebase on 3.2-rc1
>
> Currently RSS rlimit is not enforced. We can not forbid a process to exceeds
> its RSS limit and allow it swap out. That would hurts the performance of all
> system, even when memory resources are plentiful.
>
> Therefore, instead of enforcing a limit on rss usage alone, this patch enforces
> a limit on rss+swap value. This is similar to memsw limits of cgroup.
> If a process rss+swap usage exceeds RLIMIT_RSS max limit, he received a SIGBUS
> signal.
No good idea.
- RLIMIT_RSS has clear definition and this patch break it. you should makes
another rlimit at least.
- SIGBUS can be ignored. rlimit shouldn't ignorable.
WARNING: multiple messages have this Message-ID (diff)
From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
To: jmarchan@redhat.com
Cc: bsingharora@gmail.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [RFC PATCH V2] Enforce RSS+Swap rlimit
Date: Tue, 15 Nov 2011 19:02:49 -0500 [thread overview]
Message-ID: <4EC2FDA9.6050401@jp.fujitsu.com> (raw)
In-Reply-To: <4EC264AA.30306@redhat.com>
On 11/15/2011 8:10 AM, Jerome Marchand wrote:
>
> Change since V1: rebase on 3.2-rc1
>
> Currently RSS rlimit is not enforced. We can not forbid a process to exceeds
> its RSS limit and allow it swap out. That would hurts the performance of all
> system, even when memory resources are plentiful.
>
> Therefore, instead of enforcing a limit on rss usage alone, this patch enforces
> a limit on rss+swap value. This is similar to memsw limits of cgroup.
> If a process rss+swap usage exceeds RLIMIT_RSS max limit, he received a SIGBUS
> signal.
No good idea.
- RLIMIT_RSS has clear definition and this patch break it. you should makes
another rlimit at least.
- SIGBUS can be ignored. rlimit shouldn't ignorable.
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next prev parent reply other threads:[~2011-11-16 1:15 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-04 14:45 [RFC PATCH] Enforce RSS+Swap rlimit Jerome Marchand
2011-11-04 14:45 ` Jerome Marchand
2011-11-15 13:10 ` [RFC PATCH V2] " Jerome Marchand
2011-11-15 13:10 ` Jerome Marchand
2011-11-16 0:02 ` KOSAKI Motohiro [this message]
2011-11-16 0:02 ` KOSAKI Motohiro
2011-11-16 9:40 ` Jerome Marchand
2011-11-16 9:40 ` Jerome Marchand
2011-11-16 10:09 ` Balbir Singh
2011-11-16 10:09 ` Balbir Singh
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