Re: WARNING: CPU: 2 PID: 1 at arch/x86/mm/ioremap.c:171 __ioremap_caller+0x290/0x2fa()

From: Fabio Coatti <fabio.coatti@gmail.com>
To: Bjorn Helgaas <bhelgaas@google.com>
Cc: Stephane Eranian <eranian@google.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	LKML <linux-kernel@vger.kernel.org>,
	"mingo@elte.hu" <mingo@elte.hu>,
	Arnaldo Carvalho de Melo <acme@redhat.com>,
	"ak@linux.intel.com" <ak@linux.intel.com>,
	"Yan, Zheng" <zheng.z.yan@intel.com>
Subject: Re: WARNING: CPU: 2 PID: 1 at arch/x86/mm/ioremap.c:171 __ioremap_caller+0x290/0x2fa()
Date: Fri, 11 Jul 2014 09:38:56 +0200	[thread overview]
Message-ID: <3524198.dm6HbYTJqK@calvin> (raw)
In-Reply-To: <20140710200527.GA15190@google.com>

In data giovedì 10 luglio 2014 14:05:27, Bjorn Helgaas ha scritto:
> On Thu, Jul 10, 2014 at 09:12:44PM +0200, Stephane Eranian wrote:
> > On Thu, Jul 10, 2014 at 2:13 PM, Fabio Coatti <fabio.coatti@gmail.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@pd.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.
> 
> Yep, this [1]:
> 
>     cb171f7abb9a PNP: Work around BIOS defects in Intel MCH area reporting
> 
> which appeared in v3.15, so it should be in your kernel.  But apparently
> it didn't work.  Fabio, can you pastebin your complete dmesg log?
> 
> [1]
> http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c
> b171f7abb9a

Sure, here you go:

http://pastebin.com/FiL7N64b

-- 
Fabio