Re: [Xen-devel] Xen 4.12.0-rc Hangs Around masked ExtINT on CPU#

["John L. Poole" <jlpoole56@xxxxxxxxx>]

On 3/25/2019 8:53 AM, Jan Beulich wrote:
> > > > On 22.03.19 at 10:53, <jlpoole56@xxxxxxxxx> wrote:
> > 2) Xen Source - here is the log of an attempt adding "cpuinfor maxcpus=1"
> > as an option in myman_xen.cfg:
> > https://pastebin.com/ifHZqCuX (6months)
> Well, the "maxcpus=1" doesn't really hide the issue (anymore) because
> we now bring up all secondary processors despite this option (and then
> park them because of the option). But other than for 1) (yet like for 3))
> two of the secondary processors get brought up fine here. Could you
> check whether this is random, i.e. whether with the same set of options
> you observe varying or consistent mileage? In the latter case slowing
> things further down might by another worthwhile experiment, all to get
> a feel for whether we're dealing with some systematic issue in our code
> or some timing issue.
>
> Jan
I removed the "maxcpus=1" and attempted seven (7) boots.
There were minor variations, they do not seem to get
past the first additional processor.  Below is a summary.

Hang points at https://pastebin.com/9gab3fZm

293:
(XEN) [2019-03-25 16:31:47] 3.
(XEN) [2019-03-25 16:31:47] Asserting INIT.
(XEN) [2019-03-25 16:31:47] Waiting for send to finish...

604
(XEN) [2019-03-25 16:33:35] Asserting INIT.
(XEN) [2019-03-25 16:33:35] Waiting for send to finish...
(XEN) [2019-03-25 16:33:35] +Deasserting INIT.
(XEN) [2019-03-25 16:33:35] Waiting for send to finish...

915:
(XEN) [2019-03-25 16:35:12] 3.
(XEN) [2019-03-25 16:35:12] Asserting INIT.
(XEN) [2019-03-25 16:35:12] Waiting for send to finish...
(XEN) [2019-03-25 16:35:12] +Deasserting INIT.

1225:
(XEN) [2019-03-25 16:36:52] 3.
(XEN) [2019-03-25 16:36:52] Asserting INIT.
(XEN) [2019-03-25 16:36:52] Waiting for send to finish...

1538:
(XEN) [2019-03-25 16:38:23] 3.
(XEN) [2019-03-25 16:38:23] Asserting INIT.
(XEN) [2019-03-25 16:38:23] Waiting for send to finish...
(XEN) [2019-03-25 16:38:24] +Deasserting INIT.
(XEN) [2019-03-25 16:38:24] Waiting for send to finish...

1848:
(XEN) [2019-03-25 16:39:52] 3.
(XEN) [2019-03-25 16:39:52] Asserting INIT.
(XEN) [2019-03-25 16:39:52] Waiting for send to finish...

2159:
(XEN) [2019-03-25 16:41:19] 1.
(XEN) [2019-03-25 16:41:19] 2.
(XEN) [2019-03-25 16:41:19] 3.
(XEN) [2019-03-25 16:41:19] Asserting INIT.
(XEN) [2019-03-25 16:41:19] Waiting for send to finish...

-- John

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