From: Markus Trippelsdorf <markus@trippelsdorf.de>
To: Peter Zijlstra <peterz@infradead.org>
Cc: linux-kernel@vger.kernel.org,
Dipankar Sarma <dipankar@in.ibm.com>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
Ingo Molnar <mingo@kernel.org>
Subject: Re: [Bisected] qemu hangs on current git
Date: Wed, 22 Jan 2014 12:44:43 +0100 [thread overview]
Message-ID: <20140122114443.GA389@x4> (raw)
In-Reply-To: <20140122102435.GH31570@twins.programming.kicks-ass.net>
On 2014.01.22 at 11:24 +0100, Peter Zijlstra wrote:
> On Wed, Jan 22, 2014 at 10:37:55AM +0100, Markus Trippelsdorf wrote:
> > git bisect points to:
> >
> > commit 8cb75e0c4ec9786b81439761eac1d18d4a931af3
> > Author: Peter Zijlstra <peterz@infradead.org>
> > Date: Wed Nov 20 12:22:37 2013 +0100
> >
> > sched/preempt: Fix up missed PREEMPT_NEED_RESCHED folding
> >
>
> No idea why kvm would go funny on that, real hardware runs fine.
>
> You're running a !PREEMPT kernel, right? Does the below make any
> difference?
Yes: CONFIG_PREEMPT_VOLUNTARY=y
And yes, your patch fixes the issue.
Thanks.
--
Markus
next prev parent reply other threads:[~2014-01-22 11:44 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-21 21:51 qemu hangs on current git Markus Trippelsdorf
2014-01-22 8:50 ` Markus Trippelsdorf
2014-01-22 9:37 ` [Bisected] " Markus Trippelsdorf
2014-01-22 10:24 ` Peter Zijlstra
2014-01-22 11:44 ` Markus Trippelsdorf [this message]
2014-01-22 11:54 ` Peter Zijlstra
2014-01-23 16:46 ` [tip:sched/urgent] sched/preempt/x86: Fix voluntary preempt for x86 tip-bot for Peter Zijlstra
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