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Re: [Xen-devel] dump with xen-unstable & linux 3.2.17

  • To: Jan Beulich <JBeulich@xxxxxxxx>
  • From: Juergen Gross <juergen.gross@xxxxxxxxxxxxxx>
  • Date: Wed, 23 May 2012 13:00:54 +0200
  • Cc: xen-devel <xen-devel@xxxxxxxxxxxxx>, keir@xxxxxxx, Ben Guthro <ben@xxxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
  • Delivery-date: Wed, 23 May 2012 11:01:28 +0000
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On 05/23/2012 11:39 AM, Jan Beulich wrote:
On 22.05.12 at 23:00, Ben Guthro<ben@xxxxxxxxxx>  wrote:
I've bisected this to the following commit in the xen-unstable git tree.

I'll be able to dive in a little deeper tomorrow.
If you see anything here that looks suspicious to the crash
referenced... let me know.
As the change was really a re-write of a submission by JÃrgen,
I'm adding him to Cc.

Unless he has an immediate idea, we definitely want to
understand why "cpus" is empty - hence we'd want to see
*online, *vc->cpu_affinity, vc->cpu_id, and maybe
vc->processor. (Printing them is probably not a good idea
here, so I'd instead suggest just copying them to [additional]
on-stack variables, making sure the compiler doesn't optimize
them away.)

Probably it would be good to also know what each active
vCPU's ->cpu_affinity was right before suspend and/or right
after resume (perhaps in freeze_domains() and/or
thaw_domains(). That way we'd at least know whether the
affinity - despite the offending changeset's inverse intention -
did get changed during the resume process.

No idea, sorry.
I tested the patch only against a problem with power_off, so I never hit the
resume path.


Juergen Gross                 Principal Developer Operating Systems
PDG ES&S SWE OS6                       Telephone: +49 (0) 89 3222 2967
Fujitsu Technology Solutions              e-mail: juergen.gross@xxxxxxxxxxxxxx
Domagkstr. 28                           Internet: ts.fujitsu.com
D-80807 Muenchen                 Company details: ts.fujitsu.com/imprint.html

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