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RE: [Xen-devel] [timer/ticks related] dom0 hang during boot on large 1TB

To: Jeremy Fitzhardinge <jeremy@xxxxxxxx>, mukesh.rathor@xxxxxxxxxx
Subject: RE: [Xen-devel] [timer/ticks related] dom0 hang during boot on large 1TB system
From: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>
Date: Mon, 21 Dec 2009 15:57:33 -0800 (PST)
Cc: kurt.hackel@xxxxxxxxxx, Xen-devel@xxxxxxxxxxxxxxxxxxx, Keir Fraser <keir.fraser@xxxxxxxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxxxx>
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> From: Jeremy Fitzhardinge [mailto:jeremy@xxxxxxxx]
> There's some code in the pvops kernel which looks vaguely 
> like that, but 
> it has nothing to do with timer interrupts.  Could you be 
> more specific 
> about what you're referring to?

I spent some time rooting through the 2.6.32 code and
ended up with my head spinning.  I think the bottom line
is if there is code that may cause jiffies to increment
by a large amount from a single "tick" delivered by
Xen, it's likely the same problem can occur in 2.6.32
dom0 when running on Xen.

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