From: "Marek Marczykowski-Górecki" <marmarek@invisiblethingslab.com>
To: Andrew Cooper <Andrew.Cooper3@citrix.com>,
Juergen Gross <jgross@suse.com>
Cc: "xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>,
George Dunlap <George.Dunlap@citrix.com>,
Dario Faggioli <dfaggioli@suse.com>,
Meng Xu <mengxu@cis.upenn.edu>, Henry Wang <Henry.Wang@arm.com>
Subject: Re: [PATCH-for-4.17] xen/sched: migrate timers to correct cpus after suspend
Date: Fri, 28 Oct 2022 12:22:29 +0200 [thread overview]
Message-ID: <Y1utZequY2IC9Apw@mail-itl> (raw)
In-Reply-To: <901fa58e-6693-ca2e-9231-447f989d614d@citrix.com>
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On Fri, Oct 28, 2022 at 10:12:36AM +0000, Andrew Cooper wrote:
> On 28/10/2022 11:08, Juergen Gross wrote:
> > On 27.10.22 20:13, Marek Marczykowski-Górecki wrote:
> >
> > This is very weird. The data suggests that the scheduling resource
> > pointer
> > for cpu 1 was NULL, but I can't see how this can be the case without
> > causing
> > similar crashes without this patch.
> >
> > Are there any additional patches related to cpu on/offlining or
> > suspend/resume
> > in the hypervisor?
No such patches, it was this:
https://github.com/marmarek/xen/commits/master-credit-timers
> QubesOS runs with smt=0 by default. Siblings ought to be parked at this
> point.
Yes, indeed this test was with smt=off.
--
Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab
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next prev parent reply other threads:[~2022-10-28 10:22 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-21 14:53 [PATCH-for-4.17] xen/sched: migrate timers to correct cpus after suspend Juergen Gross
2022-10-27 18:13 ` Marek Marczykowski-Górecki
2022-10-28 10:08 ` Juergen Gross
2022-10-28 10:12 ` Andrew Cooper
2022-10-28 10:22 ` Marek Marczykowski-Górecki [this message]
2022-10-28 10:56 ` Juergen Gross
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