From: John Stultz <john.stultz@linaro.org>
To: Fengguang Wu <fengguang.wu@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: BUG: soft lockup - CPU#1 stuck for 1024s!
Date: Mon, 10 Sep 2012 10:06:33 -0700 [thread overview]
Message-ID: <504E1E19.9050106@linaro.org> (raw)
In-Reply-To: <20120909075927.GA13058@localhost>
On 09/09/2012 12:59 AM, Fengguang Wu wrote:
> Hi John,
>
> The below lockup warning pops up very occasionally in kvm guest
> kernels and it's bisected down to
>
> commit 2a8c0883c3cfffcc148ea606e2a4e7453cd75e73
> Author: John Stultz <john.stultz@linaro.org>
> Date: Fri Jul 13 01:21:56 2012 -0400
>
> time: Move xtime_nsec adjustment underflow handling timekeeping_adjust
>
> [ 8.340327] Freeing unused kernel memory: 460k freed
> [ 1107.515496] [sched_delayed] sched: RT throttling activated
> [ 1107.516439] BUG: soft lockup - CPU#1 stuck for 1024s! [swapper/1:0]
Thanks so much for sending this. One detail I'm curious about is that
these kernels from the Bug messages seem to be v3.6-rc1 or earlier.
Ingo had a fix 1d17d17484d40f2d5b35c79518597a2b25296996 ("time: Fix
adjustment cleanup bug in timekeeping_adjust") that landed in 3.6-rc2
Has this issue actually been seen on a 3.6-rc2+ kernel?
thanks
-john
next prev parent reply other threads:[~2012-09-10 17:08 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-09 7:59 BUG: soft lockup - CPU#1 stuck for 1024s! Fengguang Wu
2012-09-10 17:06 ` John Stultz [this message]
2012-09-11 23:41 ` Fengguang Wu
2012-09-11 23:50 ` John Stultz
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