linux-kernel - Re: [GIT PULL] 2 RAS fixes for 3.17, refreshed

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Message-ID: <53AD89FB.7090609@oracle.com>
Date:	Fri, 27 Jun 2014 11:12:59 -0400
From:	Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:	Borislav Petkov <bp@...en8.de>
CC:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	x86-ml <x86@...nel.org>, Tony Luck <tony.luck@...el.com>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [GIT PULL] 2 RAS fixes for 3.17, refreshed

On 06/27/2014 11:01 AM, Borislav Petkov wrote:
> On Tue, Jun 24, 2014 at 09:27:01AM -0400, Konrad Rzeszutek Wilk wrote:
>> Isn't that one a regression that was introduced in 3.16?
> Hrrm, BorisO, you said misc_register would often fail in xen, is that
> correct? Because if so, we added the error check to misc_register in
> 3.16 so the mcheck_init_device fix would have to go in now.


Yes, it fails because xen_late_init_mcelog() registers /dev/mcelog and 
(I think) it happens before mcheck_init_device().

In other words, misc_register() expected to fail in mcheck/mce.c on 
(privileged?) PV guests (provided right CONFIG_XEN_* is set).

-boris
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