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From: Dario Faggioli <dario.faggioli@citrix.com>
To: Boris Ostrovsky <boris.ostrovsky@oracle.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
	george.dunlap@eu.citrix.com, xen-devel@lists.xenproject.org
Cc: "Juergen Groß" <jgross@suse.com>,
	"Ian Jackson" <Ian.Jackson@eu.citrix.com>,
	"Wei Liu" <wei.liu@citrix.com>
Subject: Re: Xen 4.8 + Linux 4.9 + Credit2 = can't bootup
Date: Thu, 12 Jan 2017 13:50:11 +0100	[thread overview]
Message-ID: <1484225411.32021.214.camel@citrix.com> (raw)
In-Reply-To: <460a7b9d-69ae-358a-e9c0-adff42c01457@oracle.com>


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On Wed, 2017-01-04 at 22:13 -0500, Boris Ostrovsky wrote:
> On 01/04/2017 09:10 PM, Konrad Rzeszutek Wilk wrote:
> > On Wed, Jan 04, 2017 at 08:52:03PM -0500, Konrad Rzeszutek Wilk
> > wrote:
> > > I was trying to bootup on an 30 CPU machine (15 core, SMT).
> > > 
> > > It works just fine with credit1 (see further down the log)
> > > but if I try credit2 it ends up hanging during bootup.
> > > 
> > > I am a going to naively assume it is due to how the vCPUs are
> > > exposed (Where they match the physical CPUs under credit1),
> > > but under credit2 they are different.
> > 
> > It seems now that I took dom0_max_vcpus out of the picture I can
> > reproduce this with credit1 scheduler. So it looks like an Linux
> > issue.
> > 
> > Boris, any ideas? This is 4.9.
> > 
> 
> I think 4.9 is broken. There were changes in topology initialization 
> that broke Xen in early 4.9 RCs. 
>
Maybe it's me misremembering/saying stupid things, but I recall that at
some point we were testing some of the recent and in development Linux
branches in OSSTest.

I don't think we do that any longer, and that may be part of the reason
why we missed this one?

Ian, Wei, thoughts?

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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  parent reply	other threads:[~2017-01-12 12:50 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-01-18 15:05 [linux-linus test] 104237: regressions - FAIL osstest service owner
2017-01-05  1:52 ` Xen 4.8 + Linux 4.9 + Credit2 = can't bootup Konrad Rzeszutek Wilk
2017-01-05  2:05   ` Andrew Cooper
2017-01-05  8:39     ` Dario Faggioli
2017-01-05  9:33       ` Anshul Makkar
2017-01-05  2:10   ` Konrad Rzeszutek Wilk
2017-01-05  3:13     ` Boris Ostrovsky
2017-01-06 15:55       ` Boris Ostrovsky
2017-01-12 12:50       ` Dario Faggioli [this message]
2017-01-12 16:22         ` Boris Ostrovsky
2017-01-12 16:41           ` Dario Faggioli
2017-01-12 18:27             ` Ian Jackson
2017-01-13  3:20               ` Boris Ostrovsky
2017-01-13  8:31           ` Dario Faggioli
2017-01-13 15:39             ` Boris Ostrovsky
2017-01-13 16:27               ` Ian Jackson
2017-01-13 23:13                 ` Boris Ostrovsky
2017-01-16 11:38                   ` Ian Jackson
2017-01-19 11:36                   ` Xen 4.8 + Linux 4.9 + Credit2 = can't bootup [and 1 more messages] Ian Jackson
2017-01-16 15:38                 ` Xen 4.8 + Linux 4.9 + Credit2 = can't bootup Roger Pau Monné
2017-01-16 15:39                   ` Ian Jackson
2017-01-12 18:24         ` Ian Jackson
2017-01-19 17:06 ` [linux-linus test] 104237: regressions - FAIL Boris Ostrovsky
2017-01-19 16:23   ` [linux-linus bisection] complete test-amd64-amd64-xl-qemut-win7-amd64 osstest service owner
2017-01-19 18:05     ` [linux-linus bisection] complete test-amd64-amd64-xl-qemut-win7-amd64 [and 1 more messages] Ian Jackson
2017-01-19 18:44       ` Boris Ostrovsky
2017-01-20 11:09         ` Ian Jackson
2017-01-20 16:29           ` Boris Ostrovsky
2017-01-20 16:59             ` Boris Ostrovsky
2017-01-19 18:07   ` [linux-linus test] 104237: regressions - FAIL Ian Jackson
2017-01-19 19:09     ` Boris Ostrovsky
2017-01-19 19:15       ` Boris Ostrovsky
2017-01-19 20:37         ` Julien Grall
2017-01-19 21:01           ` Boris Ostrovsky
2017-01-20 12:06           ` Ian Jackson
2017-01-23 12:16             ` Ian Jackson
2017-01-23 14:31               ` Boris Ostrovsky

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