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

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Date:	Sun, 13 Apr 2008 18:14:12 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	"Yinghai Lu" <yhlu.kernel@...il.com>
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 Sunday, 13 of April 2008, Yinghai Lu wrote:
> On Sun, Apr 13, 2008 at 1:24 AM, Yinghai Lu <yhlu.kernel@...il.com> 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...
> >
> 
> then with this patch for io allocation overlapping...

The kernel works correctly with this patch applied.

dmesg output attached.

Thanks,
Rafael

View attachment "patched-dmesg.log" of type "text/x-log" (27521 bytes)