From: Robin Holt <holt@sgi.com>
To: linux-ia64@vger.kernel.org
Subject: Re: [PATCH] get_wchan on running task sometimes MCAs the machine.
Date: Sat, 19 May 2007 02:08:32 +0000 [thread overview]
Message-ID: <20070519020832.GA26643@lnx-holt.americas.sgi.com> (raw)
In-Reply-To: <20070517111651.GA760@lnx-holt.americas.sgi.com>
On Fri, May 18, 2007 at 04:01:21PM -0700, Luck, Tony wrote:
> If the problem *only* occurs when trying to get_wchan on the
> current task (a futile endevour) then the original patch
> should be fine all by itself ... there are no races involved
> the current task is going to remain in TASK_RUNNING state at
> any point that it happens to look at itself.
The problem I was seeing was only on the current task, but we could
have two seperate threads creating that situation. I could certain see
the argument for adding the sanity checks to the current unwind code or
verifying that libunwind does not suffer the same race conditions.
I will leave it to your discretion.
Thanks,
Robin
next prev parent reply other threads:[~2007-05-19 2:08 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-17 11:16 [PATCH] get_wchan on running task sometimes MCAs the machine Robin Holt
2007-05-17 11:38 ` Keith Owens
2007-05-17 13:00 ` Robin Holt
2007-05-17 13:05 ` Keith Owens
2007-05-17 14:16 ` David Mosberger-Tang
2007-05-18 3:02 ` Robin Holt
2007-05-18 18:23 ` David Mosberger-Tang
2007-05-18 18:35 ` Robin Holt
2007-05-18 23:01 ` Luck, Tony
2007-05-19 2:08 ` Robin Holt [this message]
2007-05-19 2:26 ` David Mosberger-Tang
2007-05-23 3:32 ` Nick Piggin
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