linux-kernel - Re: x86 git tree broken (bisected)

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Date:	Sun, 13 Apr 2008 11:54:46 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	"Ingo Molnar" <mingo@...e.hu>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"Pavel Machek" <pavel@....cz>,
	"Thomas Gleixner" <tglx@...utronix.de>, "H. Anvin" <hpa@...or.com>,
	"Arjan van de Ven" <arjan@...radead.org>
Subject: Re: x86 git tree broken (bisected)

On Sun, Apr 13, 2008 at 11:47 AM, Rafael J. Wysocki <rjw@...k.pl> wrote:
>
> On Sunday, 13 of April 2008, Yinghai Lu wrote:
>  > On Sun, Apr 13, 2008 at 9:12 AM, Rafael J. Wysocki <rjw@...k.pl> wrote:
>  > >
>  > > On Sunday, 13 of April 2008, Yinghai Lu wrote:
>  > >  > On Fri, Apr 11, 2008 at 1:51 PM, Rafael J. Wysocki <rjw@...k.pl> wrote:
>  > >  > >
>  > >  > > On Friday, 11 of April 2008, Yinghai Lu wrote:
>  > >  > >  > On Fri, Apr 11, 2008 at 12:26 PM, Rafael J. Wysocki <rjw@...k.pl> wrote:
>  > >  > >  > > On Friday, 11 of April 2008, Rafael J. Wysocki wrote:
>  > >  > >  > >  > On Thursday, 10 of April 2008, Ingo Molnar wrote:
>  > >  > >  > >  > >
>  > >  > >  > >  > > * Ingo Molnar <mingo@...e.hu> wrote:
>  > >  > >  > >  > >
>  > >  > >  > >  > > > > > > First, the X server doesn't want to start (it says it couldn't
>  > >  > >  > >  > > > > > > mmap the framebuffer).
>  > >  > >  > >  > > > > >
>  > >  > >  > >  > > > > > could you send your .config?
>  > >  > >  > >  > > > >
>  > >  > >  > >  > > > > Attached.
>  > >  > >  > >  > > >
>  > >  > >  > >  > > > could you disable this option:
>  > >  > >  > >  > > >
>  > >  > >  > >  > > >  CONFIG_NONPROMISC_DEVMEM=y
>  > >  > >  > >  > > >
>  > >  > >  > >  > > > does it help with the X problem?
>  > >  > >  > >  >
>  > >  > >  > >  > That didn't help.
>  > >  > >  > >  >
>  > >  > >  > >  > > btw., Xorg works fine here on a comparable AMD system - but i use a
>  > >  > >  > >  > > rather new distro (Fedora 8) which has Xorg 7.2.
>  > >  > >  > >  >
>  > >  > >  > >  > My system is an OpenSUSE 10.3 and it has Xorg 7.2 as well.
>  > >  > >  > >  >
>  > >  > >  > >  > I think the problem is somehow related to the Radeon.
>  > >  > >  > >
>  > >  > >  > >  The bisection turned up commit ea1441bdf53692c3dc1fd2658addcf1205629661
>  > >  > >  > >  "x86: use bus conf in NB conf fun1 to get bus range on, on 64-bit"  as the one
>  > >  > >  > >  causing problems.
>  > >  > >  > >
>  > >  > >  > >  Unfortunately, I can't revert cleanly it, because there are two more commits
>  > >  > >  > >  depending on it in a highly nontrivial fashion, so I have reverted all three
>  > >  > >  > >  commits
>  > >  > >  > >
>  > >  > >  > >  a365998cd2cecfb827469dbd57c29602c106cb83
>  > >  > >  > >  44f7f90fbe7a3a99aab082f765346514b7b5c705
>  > >  > >  > >  ea1441bdf53692c3dc1fd2658addcf1205629661
>  > >  > >  > >
>  > >  > >  > >  and X starts again.  Also, suspend to RAM works from under X.
>  > >  > >  >
>  > >  > >  > please keep the three patches and applied the two attached debug patches.
>  > >  > >  >
>  > >  > >  > i wonder if there is some io allocation overlapping with your system.
>  > >  > >
>  > >  > >  Attached is a boot dmesg output from the current x86 git tree with your two
>  > >  > >  patches applied.
>  > >  > >
>  > >  > can you try to apply the patch i sent to you about agp bridge order
>  > >  > reading for buggy silicon?
>  > >  >
>  > >  > Please boot kernel with "debug"...
>  > >  >
>  > >  > I want to verify if you can get
>  > >  >
>  > >  > "
>  > >  > Aperture conflicts with PCI mapping.
>  > >  > "
>  > >  >
>  > >  > in your boot log...
>  > >
>  > >  It's not present in there:
>  > >
>  > >  rafael@...ercik:~> grep Aperture failing-with-patch-dmesg.log
>  > >  Aperture too small (32 MB)
>  > >  Aperture from AGP @ de000000 size 4096 MB (APSIZE 0)
>  > >  Aperture too small (0 MB)
>  > >  agpgart: Aperture pointing to RAM
>  > >  agpgart: Aperture from AGP @ de000000 size 4096 MB
>  > >  agpgart: Aperture too small (0 MB)
>  > >
>  >
>  > did you apply the patch like the attached that i sent you in another mail?
>
>  This dmesg is from a kernel without the patch.
>
>  The dmesg with the patch applied was sent in a separate message:
>  http://lkml.org/lkml/2008/4/13/122
>
or you can re pull from x86.git#latest.

YH
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