From: Ingo Molnar <mingo@elte.hu>
To: Michal Piotrowski <michal.k.k.piotrowski@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Anant Nitya <kernel@prachanda.info>,
linux-kernel@vger.kernel.org
Subject: Re: [BUG] local_softirq_pending storm
Date: Tue, 22 May 2007 22:10:46 +0200 [thread overview]
Message-ID: <20070522201046.GA6113@elte.hu> (raw)
In-Reply-To: <6bffcb0e0705221203s1ba21ed3j641e91036859db7d@mail.gmail.com>
* Michal Piotrowski <michal.k.k.piotrowski@gmail.com> wrote:
> Bad news - I hit a bug in 2.6.22-rc2-hrt3. Bug symptoms:
> - X hangs (keyboard, mouse, sound etc.)
> - only Magic SysRq works
please try the patch below! I think we have nailed this bug.
Ingo
Index: linux/kernel/sched.c
===================================================================
--- linux.orig/kernel/sched.c
+++ linux/kernel/sched.c
@@ -4212,9 +4212,7 @@ int __sched cond_resched_softirq(void)
BUG_ON(!in_softirq());
if (need_resched() && system_state == SYSTEM_RUNNING) {
- raw_local_irq_disable();
- _local_bh_enable();
- raw_local_irq_enable();
+ local_bh_enable();
__cond_resched();
local_bh_disable();
return 1;
next prev parent reply other threads:[~2007-05-22 20:11 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-09 14:12 [BUG] local_softirq_pending storm Anant Nitya
2007-05-09 16:31 ` Thomas Gleixner
2007-05-10 11:53 ` Anant Nitya
2007-05-10 21:58 ` Thomas Gleixner
2007-05-17 6:41 ` Anant Nitya
2007-05-18 13:01 ` Thomas Gleixner
2007-05-19 4:30 ` Anant Nitya
2007-05-19 9:55 ` Anant Nitya
2007-05-19 19:11 ` Thomas Gleixner
2007-05-19 21:23 ` Anant Nitya
2007-05-20 21:43 ` Thomas Gleixner
2007-05-21 6:22 ` Anant Nitya
2007-05-21 9:01 ` Thomas Gleixner
2007-05-21 10:02 ` Anant Nitya
2007-05-21 18:45 ` Anant Nitya
2007-05-22 19:03 ` Michal Piotrowski
2007-05-22 19:59 ` Michal Piotrowski
2007-05-22 20:10 ` Ingo Molnar [this message]
2007-05-22 20:23 ` Michal Piotrowski
2007-05-23 17:00 ` Chuck Ebbert
2007-05-23 18:38 ` Chuck Ebbert
2007-05-23 23:24 ` Anant Nitya
2007-05-23 23:24 ` Anant Nitya
2007-05-24 7:45 ` Ingo Molnar
2007-05-20 10:18 ` Heiko Carstens
2007-05-20 13:52 ` Thomas Gleixner
2007-05-20 18:36 ` Heiko Carstens
[not found] ` <20070520191800.GA14225@osiris.ibm.com>
[not found] ` <1179689389.6570.1.camel@chaos>
[not found] ` <20070521200428.GA9855@osiris.ibm.com>
2007-05-23 20:54 ` Mikulas Patocka
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