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

To: Jan Beulich <JBeulich@xxxxxxxxxx>, 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: Tue, 22 Dec 2009 07:30:24 -0800 (PST)
Cc: kurt.hackel@xxxxxxxxxx, Jeremy Fitzhardinge <jeremy@xxxxxxxx>, Xen-devel@xxxxxxxxxxxxxxxxxxx, Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
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> >>> "Jan Beulich" <JBeulich@xxxxxxxxxx> 22.12.09 15:17 >>>
> >There's another thing that seems inconsistent with this 
> report: jiffies
> >itself as well as all the arithmetic in 
> calibrate_delay_direct() is using
> >"unsigned long", so is being done 64-bit on x86-64 (which we're
> >talking about here). Hence I can see even less how an overflow could
> >have happened, or how using explicit 64-bit types (or 
> get_jiffies_64())
> >here can help.
> Oh, or are we talking about 32-bit Dom0 on 64-bit Xen here? I don't
> recall this having been mentioned anywhere, but maybe I just
> overlooked it.

Mukesh's work has been on a 32-bit dom0.

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