From: Dario Faggioli <dario.faggioli@citrix.com>
To: Jan Beulich <JBeulich@suse.com>,
George Dunlap <george.dunlap@citrix.com>
Cc: xen-devel@lists.xenproject.org,
Anshul Makkar <anshul.makkar@citrix.com>,
MengXu <mengxu@cis.upenn.edu>
Subject: dependences for backporting to 4.5 [was: Re: [PATCH 2/3] xen: Have schedulers revise initial placement]
Date: Fri, 12 Aug 2016 10:58:49 +0200 [thread overview]
Message-ID: <1470992329.6250.87.camel@citrix.com> (raw)
In-Reply-To: <57A4AFA70200007800103367@prv-mh.provo.novell.com>
[-- Attachment #1.1: Type: text/plain, Size: 1483 bytes --]
On Fri, 2016-08-05 at 07:24 -0600, Jan Beulich wrote:
> > > > On 01.08.16 at 14:32, <dario.faggioli@citrix.com> wrote:
> > Yes, I think they're good backporting candidates.
> Well, they appear to work fine on 4.7, but putting them onto 4.5
> causes an early boot crash (BUG_ON( cpu != svc->vcpu->processor )
> in __runq_insert()).
>
I just tested staging-4.5 plus your backport of these patches (i.e.,
the two commits that you have then reverted), and I haven't seen
this... how can it that be?
> Pulling in e59321d154 ("credit: remove cpu
> argument to __runq_insert()") obviously makes that crash go
> away, just to, a little later, hit the similar one close to the top
> of
> csched_load_balance().
>
In fact, I'd say that as far as I can see, the same that I said about
backporting to 4.6, does the trick for 4.5 as well:
https://lists.xen.org/archives/html/xen-devel/2016-08/msg01673.html
I've double checked that I am using the proper tree and code, and it
looks like I do.
Can (anyone of) you have a go with that?
If I'm right, and "just" avoiding to call insert_vcpu() for idle vcpu
is enough, the question about what's the best path is the same as fo
4.6.
Regards,
Dario
--
<<This happens because I choose it to happen!>> (Raistlin Majere)
-----------------------------------------------------------------
Dario Faggioli, Ph.D, http://about.me/dario.faggioli
Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)
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next prev parent reply other threads:[~2016-08-12 8:59 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-15 18:02 [PATCH 1/3] xen: Some code motion to avoid having to do forward-declaration George Dunlap
2016-07-15 18:02 ` [PATCH 2/3] xen: Have schedulers revise initial placement George Dunlap
2016-07-15 18:07 ` Andrew Cooper
2016-07-16 14:12 ` Dario Faggioli
2016-07-18 18:10 ` Andrew Cooper
2016-07-18 18:55 ` Dario Faggioli
2016-07-18 21:36 ` Andrew Cooper
2016-07-19 7:14 ` Dario Faggioli
2016-07-18 10:28 ` Dario Faggioli
2016-07-25 11:17 ` George Dunlap
2016-07-25 14:36 ` Meng Xu
2016-07-26 9:17 ` Dario Faggioli
2016-07-25 14:35 ` Meng Xu
2016-08-01 10:40 ` Jan Beulich
2016-08-01 12:32 ` Dario Faggioli
2016-08-05 13:24 ` Jan Beulich
2016-08-05 14:09 ` Dario Faggioli
2016-08-05 14:44 ` Jan Beulich
2016-08-11 14:59 ` Dario Faggioli
2016-08-11 15:51 ` Andrew Cooper
2016-08-11 23:35 ` Dario Faggioli
2016-08-12 1:59 ` dependences for backporting to 4.6 [was: Re: [PATCH 2/3] xen: Have schedulers revise initial placement] Dario Faggioli
2016-08-12 13:53 ` Jan Beulich
2016-08-16 10:21 ` Dario Faggioli
2016-08-16 11:21 ` Jan Beulich
2016-08-12 8:58 ` Dario Faggioli [this message]
2016-07-15 18:02 ` [PATCH 3/3] xen: Remove buggy initial placement algorithm George Dunlap
2016-07-15 18:10 ` Andrew Cooper
2016-07-16 13:55 ` Dario Faggioli
2016-07-18 10:03 ` George Dunlap
2016-07-16 15:48 ` [PATCH 1/3] xen: Some code motion to avoid having to do forward-declaration Meng Xu
2016-07-18 9:58 ` Dario Faggioli
2016-07-18 10:06 ` George Dunlap
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