From: Mike Kravetz <kravetz@us.ibm.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Steven Rostedt <rostedt@goodmis.org>,
Clark Williams <williams@redhat.com>
Subject: Re: -rt scheduling: wakeup bug?
Date: Tue, 2 Oct 2007 12:30:50 -0700 [thread overview]
Message-ID: <20071002193050.GB3162@monkey.ibm.com> (raw)
In-Reply-To: <20071002050632.GB28345@elte.hu>
On Tue, Oct 02, 2007 at 07:06:32AM +0200, Ingo Molnar wrote:
> * Mike Kravetz <kravetz@us.ibm.com> wrote:
> >
> > My observations/debugging/conclusions are based on an earlier version
> > of the code. It appears the same code/issue still exists in the most
> > version. But, I have not not done any work with the latest version.
>
> I believe you are right - nice catch of this very nontrivial bug! The
> patch below is against .23-rc - do you think this fix (of moving the rt
> wakeup sequence to after the activate_task()) is adequate?
Yes, I have been running with a similar patch on a (much) earlier
version of the code. It has helped quite a bit. I would have
put together a patch for a later version, but my test environment
is limited to this earlier version.
--
Mike
next prev parent reply other threads:[~2007-10-02 19:30 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-01 22:15 RT scheduling: wakeup bug? Mike Kravetz
2007-10-02 5:06 ` -rt " Ingo Molnar
2007-10-02 19:30 ` Mike Kravetz [this message]
2007-10-02 19:37 ` Steven Rostedt
2007-10-03 17:37 ` Mike Kravetz
2007-10-04 8:02 ` Ingo Molnar
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