Date: Sun, 18 Jan 2009 19:22:36 +0100
From: Ingo Molnar <mingo@elte.hu>
To: Mandeep Singh Baines <msb@google.com>
Cc: linux-kernel@vger.kernel.org, hannes@cmpxchg.org, rientjes@google.com,
       mbligh@google.com, thockin@google.com
Subject: Re: [PATCH] softlockup: fix potential race in hung_task when
	resetting timeout
Message-ID: <20090118182236.GB24570@elte.hu>
References: <20090116171832.GA18799@elte.hu> <20090117183148.GA20173@google.com>
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* Mandeep Singh Baines <msb@google.com> wrote:

> Patch against tip/core/softlockup.
> 
> ---
> 
> A potential race exists if sysctl_hung_task_timeout_secs is reset to 0
> while inside check_hung_uniterruptible_tasks(). If check_task() is
> entered, a comparison with 0 will result in a false hung_task being
> detected.
> 
> If sysctl_hung_task_panic is set, the system will panic.
> 
> Signed-off-by: Mandeep Singh Baines <msb@google.com>
> ---
>  kernel/hung_task.c |   24 ++++++++++++++++--------
>  1 files changed, 16 insertions(+), 8 deletions(-)

Applied to tip/core/softlockup, thanks Mandeep!

	Ingo
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