LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: "Rafael J. Wysocki" <rjw@sisk.pl>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Ingo Molnar <mingo@elte.hu>, Steven Rostedt <rostedt@goodmis.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>
Subject: [Regression] 2.6.24-git9: RT sched mishandles artswrapper (bisected)
Date: Fri, 1 Feb 2008 02:37:58 +0100	[thread overview]
Message-ID: <200802010237.59320.rjw@sisk.pl> (raw)

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

             reply	other threads:[~2008-02-01  1:40 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-01  1:37 Rafael J. Wysocki [this message]
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

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=200802010237.59320.rjw@sisk.pl \
    --to=rjw@sisk.pl \
    --cc=a.p.zijlstra@chello.nl \
    --cc=akpm@linux-foundation.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mingo@elte.hu \
    --cc=rostedt@goodmis.org \
    --subject='Re: [Regression] 2.6.24-git9: RT sched mishandles artswrapper (bisected)' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).