Re: [PATCH] XPC heartbeat timer function must run on CPU 0

From: Simon Horman <horms_at_verge.net.au>
Date: 2007-11-15 07:49:14
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

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Received on Thu Nov 15 07:49:30 2007

This archive was generated by hypermail 2.1.8 : 2007-11-15 07:49:52 EST