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From: Balbir Singh <balbir@linux.vnet.ibm.com>
To: Paul Jackson <pj@sgi.com>
Cc: menage@google.com, vatsa@in.ibm.com,
	ckrm-tech@lists.sourceforge.net, balbir@in.ibm.com,
	haveblue@us.ibm.com, xemul@sw.ru, dev@sw.ru,
	containers@lists.osdl.org, devel@openvz.org,
	ebiederm@xmission.com, mbligh@google.com, rohitseth@google.com,
	serue@us.ibm.com, akpm@linux-foundation.org,
	svaidy@linux.vnet.ibm.com, linux-kernel@vger.kernel.org
Subject: Re: [ckrm-tech] [PATCH 1/9] Containers (V9): Basic container framework
Date: Wed, 02 May 2007 09:14:01 +0530	[thread overview]
Message-ID: <46380901.2050001@linux.vnet.ibm.com> (raw)
In-Reply-To: <20070501114030.62b85494.pj@sgi.com>

Paul Jackson wrote:
>   [[ I have bcc'd one or more batch scheduler experts on this post.
>      They will know who they are, and should be aware that they are
>      not listed in the public cc list of this message.     - pj ]]
> 
> Balbir Singh, responding to Paul Menage's Container patch set on lkml, wrote:
>>> +*** notify_on_release is disabled in the current patch set. It may be
>>> +*** reactivated in a future patch in a less-intrusive manner
>>> +
>> Won't this break user space tools for cpusets?
> 
> 
> Yes - disabling notify_on_release would definitely break some important
> uses of cpusets.  This feature must be reactivated somehow before I'll
> sign up for putting this patch set in the main line.
> 
> Actually, after I posted a few days ago in another lkml post:
> 	http://lkml.org/lkml/2007/4/29/66
> 
> that just the simplest cpuset command:
> 	mount -t cpuset cpuset /dev/cpuset
> 	mkdir /dev/cpuset/foo
> 	echo 0 > /dev/cpuset/foo/mems
> 
> caused an immediate kernel deadlock (Srivatsa has proposed a fix), it
> is pretty clear that this container patch set is not getting the cpuset
> testing it will need for acceptance.  That's partly my fault.
> 
> The batch scheduler folks, such as the variants of PBS, LSF and SGE are
> major user of cpusets on NUMA hardware.
> 
> This container based replacement for cpusets isn't ready for the main
> line until at least one of those schedulers can run through one of
> their test suites.  I hesitate to even acknowledge this, as I might be
> the only person in a position to make this happen, and my time
> available to contribute to this patch set has been less than I would
> like.
> 
> But if it looks like we have all the pieces in place to base cpusets
> on containers, with no known regressions in cpuset capability, then
> we must find a way to ensure that one of these batch schedulers, using
> cpusets on a NUMA box, still works.
> 

Would it be possible to extract those test cases and integrate them
with a testing framework like LTP? Do you have any regression test
suite for cpusets that can be made available publicly so that
any changes to cpusets can be validated?

The reason I ask for the test suite is that I suspect that the
container framework will evolve further and a reliable testing
mechanism would be extremely useful.

-- 
	Warm Regards,
	Balbir Singh
	Linux Technology Center
	IBM, ISTL

  reply	other threads:[~2007-05-02  3:44 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-04-27 10:46 [PATCH 0/9] Containers (V9): Generic Process Containers menage
2007-04-27 10:46 ` [PATCH 1/9] Containers (V9): Basic container framework menage
2007-04-29  3:12   ` [ckrm-tech] " Paul Jackson
2007-05-01 17:40   ` Balbir Singh
2007-05-01 17:46     ` Paul Menage
2007-05-01 18:40     ` [ckrm-tech] " Paul Jackson
2007-05-02  3:44       ` Balbir Singh [this message]
2007-05-02  6:12         ` Paul Jackson
2007-05-10  4:09           ` Balbir Singh
2007-05-10  4:47             ` Paul Jackson
2007-05-10  4:49               ` Balbir Singh
2007-04-27 10:46 ` [PATCH 2/9] Containers (V9): Example CPU accounting subsystem menage
2007-05-01 17:52   ` Balbir Singh
2007-04-27 10:46 ` [PATCH 3/9] Containers (V9): Add tasks file interface menage
2007-05-01 18:12   ` Balbir Singh
2007-05-01 20:37     ` [ckrm-tech] " Paul Menage
2007-05-02  3:25       ` Srivatsa Vaddagiri
2007-05-02  3:25         ` Paul Menage
2007-05-02  3:46           ` Srivatsa Vaddagiri
2007-05-08 14:51           ` Balbir Singh
2007-05-10 21:21             ` Paul Menage
2007-05-11  2:31               ` Balbir Singh
2007-05-02  3:58       ` Balbir Singh
2007-04-27 10:46 ` [PATCH 4/9] Containers (V9): Add fork/exit hooks menage
2007-04-27 10:46 ` [PATCH 5/9] Containers (V9): Add container_clone() interface menage
2007-04-27 10:46 ` [PATCH 6/9] Containers (V9): Add procfs interface menage
2007-04-27 10:46 ` [PATCH 7/9] Containers (V9): Make cpusets a client of containers menage
2007-04-27 10:46 ` [PATCH 8/9] Containers (V9): Share css_group arrays between tasks with same container memberships menage
2007-04-27 10:46 ` [PATCH 9/9] Containers (V9): Simple debug info subsystem menage
2007-04-29  1:47 ` [PATCH 0/9] Containers (V9): Generic Process Containers Paul Jackson
2007-04-29  9:37 ` Paul Jackson
2007-04-30 17:12   ` Srivatsa Vaddagiri
2007-04-30 17:09     ` Paul Menage
2007-04-30 18:06       ` Srivatsa Vaddagiri
2007-04-30 17:23     ` Christoph Hellwig
2007-04-30 18:16       ` [ckrm-tech] " Srivatsa Vaddagiri

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