From: Keith Owens <kaos@sgi.com>
To: linux-ia64@vger.kernel.org
Subject: Re: [PATCH] get_wchan on running task sometimes MCAs the machine.
Date: Thu, 17 May 2007 13:05:36 +0000 [thread overview]
Message-ID: <10012.1179407136@ocs3.ocs.com.au> (raw)
In-Reply-To: <20070517111651.GA760@lnx-holt.americas.sgi.com>
Robin Holt (on Thu, 17 May 2007 08:00:07 -0500) wrote:
>On Thu, May 17, 2007 at 09:38:59PM +1000, Keith Owens wrote:
>> So even with that check, it can race between not running and running
>> while you do the unwind, and still get the MCA.
>
>To me, this still seems like a reasonable check. Do you object to
>this patch or are you just pointing out the hole.
No objection to the patch, but the race means that any test on the
task's status is going to be an incomplete fix. David Mosberger
reckons that unwind should never cause an error, maybe we should be
looking at adding more checks to the unwind code to cope with spurious
addresses?
next prev parent reply other threads:[~2007-05-17 13:05 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 [this message]
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
2007-05-19 2:26 ` David Mosberger-Tang
2007-05-23 3:32 ` Nick Piggin
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