linux-kernel - Re: [PATCH v3 2/6] account guest time per-cgroup as well.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <4FC5F82B.6030404@parallels.com>
Date:	Wed, 30 May 2012 14:36:27 +0400
From:	Glauber Costa <glommer@...allels.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
CC:	<linux-kernel@...r.kernel.org>, <cgroups@...r.kernel.org>,
	<devel@...nvz.org>, Paul Turner <pjt@...gle.com>,
	Tejun Heo <tj@...nel.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	<handai.szj@...il.com>, <Andrew.Phillips@...x.com>,
	Serge Hallyn <serge.hallyn@...onical.com>
Subject: Re: [PATCH v3 2/6] account guest time per-cgroup as well.

On 05/30/2012 02:32 PM, Peter Zijlstra wrote:
> On Wed, 2012-05-30 at 13:48 +0400, Glauber Costa wrote:
>> >  We already track multiple tick statistics per-cgroup, using
>> >  the task_group_account_field facility. This patch accounts
>> >  guest_time in that manner as well.
> So this leaves IOWAIT and IDLE the only fields not using
> task_group_account_field(), right?

Yes, because they are essentially global, and their meaning is 
ill-defined from within a cgroup.

If you look further out in the patchset, I intend to export idle from 
cpu, instead of cpuacct, because something that can be used as idle 
value is already computed anyway from the schedstats, so I'm just using it.

iowait will be left blank for now. Me and Paul agreed last time we 
talked that it is not uber important to have iowait values per-cgroup.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/