From: Ingo Molnar <mingo@elte.hu>
To: Michal Schmidt <xschmi00@stud.feec.vutbr.cz>
Cc: linux-kernel@vger.kernel.org, dwalker@mvista.com,
Joe King <atom_bomb@rocketmail.com>,
ganzinger@mvista.com, Lee Revell <rlrevell@joe-job.com>,
Steven Rostedt <rostedt@goodmis.org>
Subject: Re: [patch] Real-Time Preemption, -RT-2.6.12-rc4-V0.7.47-06
Date: Wed, 1 Jun 2005 11:19:08 +0200 [thread overview]
Message-ID: <20050601091908.GA13041@elte.hu> (raw)
In-Reply-To: <4294E24E.8000003@stud.feec.vutbr.cz>
* Michal Schmidt <xschmi00@stud.feec.vutbr.cz> wrote:
> Hi Ingo,
>
> I'm now running -RT-2.6.12-rc4-V0.7.47-08 on amd64. I use cpufreq, but
> with the RT kernel it triggers "Kernel BUG at "kernel/latency.c":1295"
> (the check for preempt_count underflow).
>
> I'm attaching a patch which changes a semaphore in cpufreq into a
> completion. With this patch, my system runs OK even with cpufreqd.
btw., could you please submit this upstream too, so that it doesnt get
lost? Semaphore->completion conversions are desirable upstream for cases
where the semaphore was in reality not used for mutual exclusion but for
completion purposes. (in which case real completions are both more
readable and slightly faster)
Ingo
next prev parent reply other threads:[~2005-06-01 9:20 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-23 8:26 [patch] Real-Time Preemption, -RT-2.6.12-rc4-V0.7.47-06 Ingo Molnar
2005-05-23 9:34 ` Serge Noiraud
2005-05-23 11:23 ` Ingo Molnar
2005-05-23 14:30 ` K.R. Foley
2005-05-24 16:38 ` K.R. Foley
2005-05-25 11:34 ` Ingo Molnar
2005-05-25 11:35 ` Ingo Molnar
2005-05-25 13:28 ` K.R. Foley
2005-05-25 14:03 ` Ingo Molnar
2005-05-25 14:18 ` K.R. Foley
2005-05-25 15:20 ` K.R. Foley
2005-05-26 7:45 ` Ingo Molnar
2005-05-26 10:53 ` K.R. Foley
2005-05-26 15:23 ` K.R. Foley
2005-05-25 20:38 ` Michal Schmidt
2005-05-27 20:46 ` Michal Schmidt
2005-05-28 5:53 ` Ingo Molnar
2005-05-30 9:51 ` Michal Schmidt
2005-05-30 14:38 ` Ingo Molnar
2005-05-30 14:50 ` Ingo Molnar
2005-05-30 16:47 ` Michal Schmidt
2005-05-30 18:09 ` Ingo Molnar
2005-06-01 17:28 ` Esben Nielsen
2005-06-01 9:19 ` Ingo Molnar [this message]
2005-06-01 9:32 ` Michal Schmidt
2005-06-01 9:39 ` Ingo Molnar
-- strict thread matches above, loose matches on Subject: below --
2005-05-23 15:05 Oleg Nesterov
2005-05-23 15:12 ` Daniel Walker
2005-05-23 15:53 ` Oleg Nesterov
2005-05-23 16:48 ` Oleg Nesterov
2005-06-01 9:21 ` Ingo Molnar
2005-06-01 13:04 ` Daniel Walker
2005-06-01 13:11 ` Ingo Molnar
2005-06-01 13:21 ` Daniel Walker
2005-06-01 14:43 ` Oleg Nesterov
2005-06-01 14:43 ` Daniel Walker
2005-06-01 15:02 ` Oleg Nesterov
2005-06-01 15:05 ` Daniel Walker
2005-06-01 15:47 ` Oleg Nesterov
2005-06-01 15:43 ` Daniel Walker
2005-05-24 1:47 Perez-Gonzalez, Inaky
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