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2.6.23 regression: top displaying 9999% CPU usage

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From: Frans Pop <elendil@...>
To: <stable@...>
Cc: <linux-kernel@...>
Subject: 2.6.23 regression: top displaying 9999% CPU usage
Date: Friday, October 12, 2007 - 4:31 pm

Please consider this patch for 2.6.23.2
http://lkml.org/lkml/2007/10/4/389

tested by me in
http://lkml.org/lkml/2007/10/5/150

to fix the regression first reported in
http://lkml.org/lkml/2007/10/3/123

Cause of the wrong display in top is the value of stime in /proc/<pid>/stat 
decreasing occasionally.

The issue is also registered as:
http://bugzilla.kernel.org/show_bug.cgi?id=9135

Thanks,
Frans Pop
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Messages in current thread:
2.6.23 regression: top displaying 9999% CPU usage, Frans Pop, (Fri Oct 12, 4:31 pm)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage, Greg KH, (Fri Oct 12, 5:22 pm)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage, Frans Pop, (Sat Oct 13, 3:53 am)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage, Christian Borntraeger, (Sun Oct 14, 4:36 pm)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage, Christian Borntraeger, (Tue Oct 16, 4:29 am)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage, Balbir Singh, (Tue Oct 16, 5:30 am)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage, Christian Borntraeger, (Tue Oct 16, 6:34 am)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage, Balbir Singh, (Tue Oct 16, 8:59 am)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage, Frans Pop, (Mon Oct 29, 8:05 am)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage, Balbir Singh, (Mon Oct 29, 8:31 am)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage, Ingo Molnar, (Mon Oct 29, 4:04 pm)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage, Balbir Singh, (Mon Oct 29, 5:43 pm)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage, Christian Borntraeger, (Tue Oct 30, 1:56 am)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage, Balbir Singh, (Tue Oct 30, 2:00 am)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage, Frans Pop, (Mon Oct 29, 7:19 pm)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage, Balbir Singh, (Mon Oct 29, 7:24 pm)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage, Ingo Molnar, (Mon Oct 29, 7:22 pm)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage, Otavio Salvador, (Tue Oct 30, 4:22 pm)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage, Christian Borntraeger, (Mon Oct 29, 4:33 pm)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage, Ingo Molnar, (Mon Oct 29, 4:41 pm)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage, Frans Pop, (Mon Oct 29, 5:22 pm)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage, Peter Zijlstra, (Mon Oct 29, 5:11 pm)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage, Frans Pop, (Tue Oct 16, 6:11 am)
Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage, Balbir Singh, (Tue Oct 16, 6:38 am)