From: Simon Horman <horms@verge.net.au>
To: linux-ia64@vger.kernel.org
Subject: Re: [PATCH] XPC heartbeat timer function must run on CPU 0
Date: Wed, 14 Nov 2007 20:49:14 +0000 [thread overview]
Message-ID: <20071114204911.GB2368@verge.net.au> (raw)
In-Reply-To: <20071107135306.99AAF11C415@aqua.americas.sgi.com>
On Thu, Nov 08, 2007 at 06:11:19AM -0600, Dean Nelson wrote:
> On Wed, Nov 07, 2007 at 08:26:59AM -0800, Luck, Tony wrote:
> > > Currently, XPC's heartbeat timer function runs on whatever CPU modprobe/insmod
> > > ran on when XPC was started. To avoid the heartbeat from being delayed for
> > > long periods the timer function must run on CPU 0.
> >
> > Does Altix allow hot remove of cpu0? If so, then you have a problem.
>
> At this time Altix does not support hot remove of cpu0, but it is something
> currently being worked on. At the time that feature is ready then this
> code would indeed need to be modified. In the meantime, we have an existing
> customer in need of a fix.
Kdump will run the second (crash) kernel on whatever CPU the crash
occurs on, so its quite possible for cpu 0 not to exist in the
second kernel. Would this be a problem for this code?
--
Horms, California Edition
next prev parent reply other threads:[~2007-11-14 20:49 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-07 13:53 [PATCH] XPC heartbeat timer function must run on CPU 0 Dean Nelson
2007-11-07 16:26 ` Luck, Tony
2007-11-08 12:11 ` Dean Nelson
2007-11-14 20:49 ` Simon Horman [this message]
2007-11-14 21:12 ` Robin Holt
2007-11-14 22:11 ` Simon Horman
2007-11-14 22:19 ` Luck, Tony
2007-11-15 17:28 ` Simon Horman
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