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From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
To: Max Vozeler <max@hinterhof.net>, Thomas Gleixner <tglx@linutronix.de>
Cc: LKML <linux-kernel@vger.kernel.org>,
	x86@kernel.org, "Peter Zijlstra" <peterz@infradead.org>,
	"Borislav Petkov" <bp@alien8.de>,
	"Charles (Chas) Williams" <ciwillia@brocade.com>,
	"M. Vefa Bicakci" <m.v.b@runbox.com>,
	"Alok Kataria" <akataria@vmware.com>,
	xen-devel <xen-devel@lists.xen.org>,
	"Juergen Groß" <jgross@suse.com>,
	"Thomas Weißschuh" <kernel@weissschuh.net>
Subject: Re: [PATCH v2] x86/smpboot: Make logical package management more robust
Date: Tue, 6 Jun 2017 21:48:37 -0400	[thread overview]
Message-ID: <20c3f46a-3514-99cb-30c3-cec6e42211cf@oracle.com> (raw)
In-Reply-To: <20170606133958.GA23069@chaos.hinterhof.net>



On 06/06/2017 09:39 AM, Max Vozeler wrote:
> Hi Thomas,
> 
> there is a problem booting recent kernels on some Xen domUs hosted by
> provider JiffyBox.
> 
> The kernel seems to crash just after logging
> [    0.038700] SMP alternatives: switching to SMP code


Do you have the crash splat? Stack trace and such.

In fact, full boot log might be useful.

> 
> We started seeing this with 4.9.2 and bisecting the 4.9 stable kernels
> determined that this commit introduced the problem. Reverting it from 4.9.2
> makes the kernel boot again.
> 
> Older kernels (starting from 3.16 up to and including 4.9.1) were running
> fine in this setup. But recent mainline (tested 4.12-rc3) and 4.9.x both
> fail to boot there.
> 
> Unfortunately we have no detailed information about the hypervisor or
> setup and the provider is not very forthcoming with details. I'm attaching
> dmesg of a successful boot (4.9.2 with this commit reverted).
> 
> It shows a fairly old XEN version:
> 
> [    0.000000] Xen version: 3.1.2-416.el5 (preserve-AD)


This is a 10 year old hypervisor so it's not especially surprising that 
newer kernels don't work. (If anything, I am surprised that you actually 
booted 4.9 at all).

There have been a bunch of problems in this area (topology) on PV guests.


-boris

  reply	other threads:[~2017-06-07  1:51 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-12-08  9:04 [PATCH] x86/smpboot: Make logical package management more robust Thomas Gleixner
2016-12-08  9:13 ` Borislav Petkov
2016-12-08 11:03 ` Peter Zijlstra
2016-12-08 12:49   ` Thomas Gleixner
2016-12-08 13:04     ` Peter Zijlstra
2016-12-08 13:09       ` Thomas Gleixner
2016-12-09 22:06 ` Thomas Gleixner
2016-12-09 23:02   ` Boris Ostrovsky
2016-12-09 23:00     ` Thomas Gleixner
2016-12-10  3:37       ` Boris Ostrovsky
2016-12-10 19:03         ` Thomas Gleixner
2016-12-10  3:27     ` Boris Ostrovsky
2016-12-10 19:09       ` Thomas Gleixner
2016-12-10 19:13         ` Thomas Gleixner
2016-12-11  3:23           ` Boris Ostrovsky
2016-12-12 10:04             ` [PATCH v2] " Thomas Gleixner
2016-12-12 19:07               ` Boris Ostrovsky
2016-12-13 11:16               ` [tip:x86/urgent] " tip-bot for Thomas Gleixner
2017-06-06 13:39               ` [PATCH v2] " Max Vozeler
2017-06-07  1:48                 ` Boris Ostrovsky [this message]
2017-06-07 12:19                   ` Max Vozeler

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