linux-kernel - Re: [Intel-gfx] agp/intel: can't ioremap flush page

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Date:	Mon, 10 Mar 2014 20:07:22 -0600
From:	Bjorn Helgaas <bhelgaas@...gle.com>
To:	Paul Bolle <pebolle@...cali.nl>
Cc:	Steven Newbury <steve@...wbury.org.uk>,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	David Airlie <airlied@...ux.ie>,
	intel-gfx <intel-gfx@...ts.freedesktop.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Yinghai Lu <yinghai@...nel.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>
Subject: Re: [Intel-gfx] agp/intel: can't ioremap flush page - no chipset flushing

On Mon, Mar 10, 2014 at 6:15 PM, Paul Bolle <pebolle@...cali.nl> wrote:
> On Mon, 2014-03-10 at 18:07 -0600, Bjorn Helgaas wrote:
>> On Mon, Mar 10, 2014 at 5:45 PM, Paul Bolle <pebolle@...cali.nl> wrote:
>> > A bit of doubt is caused by two new boot time messages:
>> >     pnp 00:00: unknown resource type 10 in _CRS
>> >     pnp 00:00: can't evaluate _CRS: 1
>> >
>> > But I haven't yet tried v3.14-rc6 without your patch, so these might be
>> > unrelated. They're unclear to me, anyway.
>>
>> Hmm, this is definitely concerning.  Resource type 10 is
>> ACPI_RESOURCE_TYPE_FIXED_MEMORY32, which we do handle (unless it's
>> length 0).  And your previous dmesg logs (at
>> https://bugzilla.kernel.org/show_bug.cgi?id=71611) don't show anything
>> like that.
>>
>> Can you attach an acpidump and the dmesg log with my patch to the bugzilla?
>
> It's getting rather late over here. So I'll try (quite) a few hours
> later. But acpidump doesn't ring any bells right now. Any hints?

There's acpidump info here: https://01.org/linux-acpi/utilities .  You
don't need to extract the binary tables or anything; just attach the
text dump to the bugzilla.

It would be very interesting to try v3.14-rc6 without my patch.  I
hope it has the same "unknown resource type" messages, because I don't
see how my patch could be related to them.  There were no recent
PNP-related changes, so then I start to worry about some sort of
memory corruption from an unrelated patch.  But I hope that's not the
case.

Bjorn
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