From: Julien Grall <julien.grall@arm.com>
To: Dario Faggioli <dario.faggioli@citrix.com>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Wei Liu <wei.liu2@citrix.com>,
Steve Capper <Steve.Capper@arm.com>,
Tianyang Chen <tiche@seas.upenn.edu>,
George Dunlap <george.dunlap@citrix.com>,
Meng Xu <mengxu@cis.upenn.edu>,
Varun.Swara@arm.com, xen-devel@lists.xenproject.org
Subject: Re: [PATCH for 4.7 0/4] Assorted scheduling fixes
Date: Thu, 5 May 2016 13:00:19 +0100 [thread overview]
Message-ID: <572B35D3.9060206@arm.com> (raw)
In-Reply-To: <1462352775.4413.17.camel@citrix.com>
Hi Dario,
On 04/05/16 10:06, Dario Faggioli wrote:
> On Tue, 2016-05-03 at 21:26 -0400, Konrad Rzeszutek Wilk wrote:
>> On Tue, May 03, 2016 at 11:46:27PM +0200, Dario Faggioli wrote:
>>>
>>> Julien, the patch is very very similar to the one attached to one
>>> of my reply
>>> in that thread, but I had to change some small bits... Can you
>>> please re-test
>>> it?
>> I tested it. It does not crash anymore. However I see this:
>>
> On what hardware/emulator? The same Julien was using?
>> (XEN) CPU1 never came online
>> (XEN) Failed to bring up CPU 1 (error -5)
>> (XEN) Bringing up CPU2
>> (XEN) CPU2 never came online
>> (XEN) Failed to bring up CPU 2 (error -5)
>> (XEN) Bringing up CPU3
>> (XEN) CPU3 never came online
>> (XEN) Failed to bring up CPU 3 (error -5)
>> (XEN) Brought up 1 CPUs
>>
>>
>> Which is not very reassuring. I don't know if that is expected.
>>
> I don't know... I've never said this on any x86 box before, and I
> wouldn't think it to be related to this series... do you see this only
> with the series applied?
Xen ARM doesn't wait indefinitely a secondary CPU to come online.
Instead, if it isn't online after a 1s, it will be skipped.
This could happen on the Foundation Model if the number of cores given
on the model command line, handled by the firmware and described in the
device tree don't match each other.
Cheers,
--
Julien Grall
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next prev parent reply other threads:[~2016-05-05 12:00 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-03 21:46 [PATCH for 4.7 0/4] Assorted scheduling fixes Dario Faggioli
2016-05-03 21:46 ` [PATCH for 4.7 1/4] xen: sched: avoid spuriously re-enabling IRQs in csched2_switch_sched() Dario Faggioli
2016-05-04 8:48 ` Jan Beulich
2016-05-04 9:08 ` Dario Faggioli
2016-05-04 15:11 ` George Dunlap
2016-05-04 15:58 ` Dario Faggioli
2016-05-04 17:05 ` George Dunlap
2016-05-04 17:21 ` Dario Faggioli
2016-05-04 17:34 ` George Dunlap
2016-05-06 13:21 ` Dario Faggioli
2016-05-06 13:48 ` Wei Liu
2016-05-09 14:42 ` George Dunlap
2016-05-03 21:46 ` [PATCH for 4.7 2/4] xen: sched: fix killing an uninitialized timer in free_pdata Dario Faggioli
2016-05-04 15:25 ` George Dunlap
2016-05-03 21:46 ` [PATCH for 4.7 3/4] xen: credit2: fix 2 (minor) issues in load tracking logic Dario Faggioli
2016-05-04 15:38 ` George Dunlap
2016-05-03 21:46 ` [PATCH for 4.7 4/4] xen: adopt .deinit_pdata and improve timer handling Dario Faggioli
2016-05-04 15:51 ` George Dunlap
2016-05-04 15:53 ` Meng Xu
2016-05-06 23:05 ` Dario Faggioli
2016-05-07 21:19 ` Meng Xu
2016-05-08 3:12 ` Meng Xu
2016-05-09 8:07 ` Juergen Gross
2016-05-09 13:22 ` Dario Faggioli
2016-05-09 14:08 ` Meng Xu
2016-05-09 14:52 ` Dario Faggioli
2016-05-09 14:58 ` Meng Xu
2016-05-09 14:46 ` George Dunlap
2016-05-09 14:58 ` Wei Liu
2016-05-09 15:35 ` George Dunlap
2016-05-04 1:26 ` [PATCH for 4.7 0/4] Assorted scheduling fixes Konrad Rzeszutek Wilk
2016-05-04 9:06 ` Dario Faggioli
2016-05-05 12:00 ` Julien Grall [this message]
2016-05-05 12:38 ` Dario Faggioli
2016-05-04 15:53 ` George Dunlap
2016-05-04 16:04 ` Wei Liu
2016-05-07 21:23 ` Meng Xu
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