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From: Balbir Singh <balbir@linux.vnet.ibm.com>
To: Frans Pop <elendil@planet.nl>
Cc: Ingo Molnar <mingo@elte.hu>,
	Christian Borntraeger <borntraeger@de.ibm.com>,
	Chuck Ebbert <cebbert@redhat.com>, Greg KH <greg@kroah.com>,
	stable@kernel.org, linux-kernel@vger.kernel.org,
	Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage
Date: Tue, 30 Oct 2007 04:54:27 +0530	[thread overview]
Message-ID: <47266BAB.2000406@linux.vnet.ibm.com> (raw)
In-Reply-To: <200710300019.28871.elendil@planet.nl>

Frans Pop wrote:
> On Monday 29 October 2007, Balbir Singh wrote:
>> We'll also need this additional patch (untested),
> 
> OK. Both patches together do the trick. Gave it a nice long test run and got 
> no more weirdness.
> Tested-by: Frans Pop <elendil@planet.nl>
> 

Thanks for testing it

Ingo, I think this fix needs to be picked as well.

>> but in the long run I think the approach needs to be
>>
>> 1. Update stime and utime at the time of context switching -- keep it
>>    in sync with p->sum_exec_runtime
>> 2. Keep track of system/user context at system call entry points
> 
> Feel free to send me a patch for testing when you have one.
> 

I hope to find some free time soon and get to it.

> Cheers,
> Frans


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

  parent reply	other threads:[~2007-10-29 23:24 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-10-12 20:31 2.6.23 regression: top displaying 9999% CPU usage Frans Pop
2007-10-12 21:22 ` [stable] " Greg KH
2007-10-13  7:53   ` Frans Pop
2007-10-14 20:36     ` Christian Borntraeger
2007-10-16  8:29       ` Christian Borntraeger
2007-10-16  9:30         ` Balbir Singh
2007-10-16 10:11           ` Frans Pop
2007-10-16 10:38             ` Balbir Singh
2007-10-16 10:34           ` Christian Borntraeger
2007-10-16 12:59             ` Balbir Singh
2007-10-29 12:05               ` Frans Pop
2007-10-29 12:31                 ` Balbir Singh
2007-10-29 20:04                   ` Ingo Molnar
2007-10-29 20:33                     ` Christian Borntraeger
2007-10-29 20:41                       ` Ingo Molnar
2007-10-29 21:11                         ` Peter Zijlstra
2007-10-29 21:22                         ` Frans Pop
2007-10-29 21:43                     ` Balbir Singh
2007-10-29 23:19                       ` Frans Pop
2007-10-29 23:22                         ` Ingo Molnar
2007-10-30 20:22                           ` Otavio Salvador
2007-10-29 23:24                         ` Balbir Singh [this message]
2007-10-30  5:56                       ` Christian Borntraeger
2007-10-30  6:00                         ` Balbir Singh

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