Date: Fri, 27 Jul 2012 10:33:11 -0400 From: Andrew Boyer <aboyer@averesystems.com> To: sbruno@freebsd.org, Andriy Gapon <avg@FreeBSD.org>, John Baldwin <jhb@FreeBSD.org> Cc: FreeBSD Stable Mailing List <freebsd-stable@freebsd.org> Subject: IPMI hardware watchdogs Re: dell r420/r320 stable/9 Message-ID: <23294764-F30B-4732-8C41-3F0ECA5F273C@averesystems.com> In-Reply-To: <1343350238.12294.10.camel@powernoodle.corp.yahoo.com> References: <1343350238.12294.10.camel@powernoodle.corp.yahoo.com>
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On Jul 26, 2012, at 8:50 PM, Sean Bruno wrote: > For the time being I had to revert the following from my stable/9 tree. > Otherwise I would get a kernel panic on shutdown from ipmi(4). > > http://svnweb.freebsd.org/base?view=revision&revision=237839 > http://svnweb.freebsd.org/base?view=revision&revision=221121 > On a somewhat related note: We noticed recently that you can't pet or disable the IPMI hardware watchdog once SCHEDULER_STOPPED() is true. This means it can fire unexpectedly while you're dumping core or rebooting, depending on how long the timeout was on the pet before the panic. The ipmi driver will need to process the command differently if the scheduler is stopped. I haven't had time to look at a fix yet. -Andrew -------------------------------------------------- Andrew Boyer aboyer@averesystems.com
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