Bug 41648

Summary:

i915: [drm] MTRR allocation failed. Graphics performance may suffer.

Product:

DRI

Reporter:

mlambda

Component:

DRM/Intel

Assignee:

Chris Wilson <chris>

Status:

CLOSED FIXED

QA Contact:

Severity:

minor

Priority:

medium

CC:

ben, chris, daniel, florian, jbarnes

Version:

unspecified

Hardware:

x86-64 (AMD64)

OS:

Linux (All)

Whiteboard:

i915 platform:

i915 features:

Attachments:

Description	Flags
kernel config	none
/proc/cpuinfo	none
dmesg	none
dmidecode	none
lspci -vvnn	none
/var/log/syslog	none
/var/log/Xorg.0.log	none
/proc/mtrr	none
Suppress warning for MTRR allocation failure when using PAT	none

Description mlambda 2011-10-10 06:51:55 UTC

On a HP Pavilion dv7 6104eg notebook I get the following error message with and without the 'enable_mtrr_cleanup' kernel parameter: '[drm] MTRR allocation failed.  Graphics performance may suffer.'

Kernel: mainline git kernel (commit a8062e421f8a5800c83b85ab10c4cefd8409844f) with these patches: http://lists.freedesktop.org/archives/intel-gfx/2011-September/012266.html (see https://bugs.freedesktop.org/show_bug.cgi?id=41343)

Distribution: Ubuntu 11.04 64 bit
uname -a: Linux hp 3.1.0-rc8-intelpatch #1 SMP Tue Oct 4 23:51:49 CEST 2011 x86_64 x86_64 x86_64 GNU/Linux

lsmod:
Module                  Size  Used by
vboxnetadp             13340  0 
vboxnetflt             28297  0 
vboxdrv               252684  2 vboxnetadp,vboxnetflt
radeon               1016468  0 
ttm                    72079  1 radeon
iwlagn                311183  0 
r8169                  55918  0

Comment 1 mlambda 2011-10-10 06:52:56 UTC

Created attachment 52174 [details]
kernel config

Comment 2 mlambda 2011-10-10 06:53:26 UTC

Created attachment 52175 [details]
/proc/cpuinfo

Comment 3 mlambda 2011-10-10 06:53:49 UTC

Created attachment 52176 [details]
dmesg

Comment 4 mlambda 2011-10-10 06:54:16 UTC

Created attachment 52177 [details]
dmidecode

Comment 5 mlambda 2011-10-10 06:54:53 UTC

Created attachment 52178 [details]
lspci -vvnn

Comment 6 mlambda 2011-10-10 06:55:29 UTC

Created attachment 52179 [details]
/var/log/syslog

Comment 7 mlambda 2011-10-10 06:56:04 UTC

Created attachment 52180 [details]
/var/log/Xorg.0.log

Comment 8 mlambda 2011-10-10 06:59:59 UTC

Created attachment 52181 [details]
/proc/mtrr

Comment 9 Chris Wilson 2011-10-10 07:03:32 UTC

And the bug is?

Comment 10 mlambda 2011-10-10 07:38:57 UTC

(In reply to comment #9)
> And the bug is?

Did you actually read the bug report? MTRR allocation fails even if I use the 'enable_mtrr_cleanup' kernel parameter (see Documentation/kernel-parameters.txt)

If this is not an error you should make the message a warning.

Comment 11 Chris Wilson 2011-10-10 07:45:18 UTC

(In reply to comment #10) 
> If this is not an error you should make the message a warning.

It is not even an error message, but an info and completely irrelevant for your hardware. Which is why I was interested to see if you observed any behaviour that supported your bug report.

Comment 12 mlambda 2011-10-10 07:53:31 UTC

(In reply to comment #11)
> (In reply to comment #10) 
> > If this is not an error you should make the message a warning.
> 
> It is not even an error message, but an info and completely irrelevant for your
> hardware. Which is why I was interested to see if you observed any behaviour
> that supported your bug report.

Sorry, I thought this was an error and should actually work.

Comment 13 Chris Wilson 2012-02-20 11:19:03 UTC

Created attachment 57345 [details] [review]
Suppress warning for MTRR allocation failure when using PAT

Comment 14 mlambda 2012-02-21 06:46:56 UTC

Thanks for your patch!

Comment 15 mlambda 2012-02-21 06:47:40 UTC

Thanks for your patch!

Comment 16 Florian Mickler 2012-07-01 03:35:10 UTC

A patch referencing this bug report has been merged in Linux v3.5-rc1:

commit 9e984bc1dffd405138ff22356188b6a1677c64c8
Author: Adam Jackson <ajax@redhat.com>
Date:   Wed Mar 14 11:22:11 2012 -0400

    drm/i915: Don't do MTRR setup if PAT is enabled

Comment 17 Jari Tahvanainen 2016-12-07 16:20:35 UTC

Closing old resolved+fixed.

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