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[Xen-devel] Re: Changeset 18359 can hang Xen?

  • To: "Cui, Dexuan" <dexuan.cui@xxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
  • Date: Tue, 26 Aug 2008 13:44:04 +0100
  • Cc:
  • Delivery-date: Tue, 26 Aug 2008 05:44:33 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AckHd2ptPJPI59i8SmWmxDpHYTn3PwAAgGBQ
  • Thread-topic: Changeset 18359 can hang Xen?

I had a report of similar nastiness *without* that changeset. 18359
apparently fixed it, although I must say I wasn't convinced since I can't
explain why it would alter behaviour.

Suffice to say there is apparently some nastiness around that
time_rendezvous functionality, and we could really do with some root-cause
analysis from someone who's reproduced this issue.

 -- Keir

On 26/8/08 13:29, "Cui, Dexuan" <dexuan.cui@xxxxxxxxx> wrote:

> x86: Time rendezvous function does not need to disable/enable IRQs.
> changeset 18359: 95f1dc27e182
> With this changeset, on my Weybridge host,  32e Xen may hang completely
> silently some time -- this may occur in dozens of minutes, or an hour,
> after Dom0 finished booting.
> I can't give the exact steps to reproduce it for now.
> Anyone has the same experience?
> Thanks
> -- Dexuan

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