linux-kernel - Re: WARNING: CPU: 2 PID: 1 at arch/x86/mm/ioremap.c:171 __ioremap

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Message-ID: <CABPqkBTu9vk_wsmYVrO6OOxgbwsLDG-A8f7dzutKwYXmoGsqnw@mail.gmail.com>
Date:	Thu, 10 Jul 2014 21:12:44 +0200
From:	Stephane Eranian <eranian@...gle.com>
To:	Fabio Coatti <fabio.coatti@...il.com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"mingo@...e.hu" <mingo@...e.hu>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	"ak@...ux.intel.com" <ak@...ux.intel.com>,
	"Yan, Zheng" <zheng.z.yan@...el.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>
Subject: Re: WARNING: CPU: 2 PID: 1 at arch/x86/mm/ioremap.c:171 __ioremap_caller+0x290/0x2fa()

On Thu, Jul 10, 2014 at 2:13 PM, Fabio Coatti <fabio.coatti@...il.com> wrote:
> In data giovedì 10 luglio 2014 10:54:48, Peter Zijlstra ha scritto:
>> On Thu, Jul 10, 2014 at 10:52:08AM +0200, Peter Zijlstra wrote:
>> > On Thu, Jul 10, 2014 at 10:44:21AM +0200, Peter Zijlstra wrote:
>> > > On Wed, Jul 09, 2014 at 12:48:05PM -0700, Fabio Coatti wrote:
>> > > > In data mercoledì 9 luglio 2014 11:54:21, Greg Kroah-Hartman ha
> scritto:
>> > > > > Try cc:ing everyone on that patch, with the original information you
>> > > > > provided, and the linux-kernel mailing list.  Those developers
>> > > > > should be
>> > > > > able to help you out properly.
>> > > >
>> > > > Ok, here you can find the description of a problem that I'm
>> > > > experiencing on
>> > > > latest kernels, since 3.15.0.  (this report comes from 3.15.4)
>> > > >
>> > > > lug 07 22:08:00 calvin kernel: resource map sanity check conflict:
>> > > > 0xfed10000 0xfed15fff 0xfed10000 0xfed13fff reserved
>> > > > lug 07 22:08:00 calvin kernel: ------------[ cut here ]------------
>> > >
>> > > I think this is a 'known' issue on Thinkpad (iirc). For some obscure
>> > > reason its BIOS has funny ideas about resources etc.
>> > >
>> > > I couldn't quickly find the prvious thread, maybe Stephane knows.
>> >
>> > Found it:
>> >   lkml.kernel.org/r/20140224162400.GE16457@...tnic
>>
>> Ok, reread that thread and no definite conclusion was found I think.
>> Just Thinkpad firmware having overlapping resources.
>
>
> So I guess that this happens also for HP Folio 9470m, not only in thinkpads. I
> wonder how many machines shares this behaviour...
>
Somehow, I thought that Bjorn had proposed a fix for this.
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