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* [Regression] 2.6.24-git9: RT sched mishandles artswrapper (bisected)
@ 2008-02-01  1:37 Rafael J. Wysocki
  2008-02-01  2:04 ` Rafael J. Wysocki
       [not found] ` <b647ffbd0802060040wbfe16afq4355e8f4f31ab06b@mail.gmail.com>
  0 siblings, 2 replies; 20+ messages in thread
From: Rafael J. Wysocki @ 2008-02-01  1:37 UTC (permalink / raw)
  To: Peter Zijlstra; +Cc: Ingo Molnar, Steven Rostedt, LKML, Andrew Morton

Hi,

This is related to the problem I reported earlier this week:
http://lkml.org/lkml/2008/1/30/554

Apparently artswrapper, run by KDE in openSUSE 10.3 with a real time priority,
is mishandled by the scheduler.  The problem is that after the user logs out,
artswrapper stays in TASK_RUNNING forever and prevents other tasks from being
scheduled on the CPU occupied by it.  In this state it also breaks suspend and
hibernation (it cannot be frozen).

Since the problem is 100% reproducible on my test boxes, I carried out a
bisection which turned out the following commit:

commit 6f505b16425a51270058e4a93441fe64de3dd435
Author: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date:   Fri Jan 25 21:08:30 2008 +0100

    sched: rt group scheduling

I'm now checking if the problem disappears after reverting this patch (along a
couple of dependent ones).

Thanks,
Rafael

^ permalink raw reply	[flat|nested] 20+ messages in thread

end of thread, other threads:[~2008-02-10 12:32 UTC | newest]

Thread overview: 20+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2008-02-01  1:37 [Regression] 2.6.24-git9: RT sched mishandles artswrapper (bisected) Rafael J. Wysocki
2008-02-01  2:04 ` Rafael J. Wysocki
2008-02-01  7:44   ` Peter Zijlstra
2008-02-01  9:50     ` Peter Zijlstra
2008-02-01 11:50       ` Rafael J. Wysocki
2008-02-01 12:09         ` Peter Zijlstra
2008-02-01 23:39           ` Rafael J. Wysocki
2008-02-05 21:46             ` Dmitry Adamushko
2008-02-06  1:21               ` Rafael J. Wysocki
     [not found] ` <b647ffbd0802060040wbfe16afq4355e8f4f31ab06b@mail.gmail.com>
     [not found]   ` <1202288548.19243.47.camel@lappy>
2008-02-06 18:25     ` Rafael J. Wysocki
2008-02-06 21:43       ` Peter Zijlstra
2008-02-06 21:50         ` Rafael J. Wysocki
2008-02-06 22:01           ` Peter Zijlstra
2008-02-06 22:18             ` Rafael J. Wysocki
2008-02-06 22:34               ` Peter Zijlstra
2008-02-06 23:31                 ` Rafael J. Wysocki
2008-02-06 23:34                   ` Ingo Molnar
2008-02-07 19:53                     ` Rafael J. Wysocki
2008-02-07 21:20                       ` Peter Zijlstra
2008-02-10 12:30                     ` Rafael J. Wysocki

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