linux-kernel - Re: [patch 0/4] x86: PAT followup - Incremental changes and bug fixes

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Date:	Thu, 17 Jan 2008 20:12:11 +0100
From:	"Andreas Herrmann3" <andreas.herrmann3@....com>
To:	"Venki Pallipadi" <venkatesh.pallipadi@...el.com>
cc:	ak@....de, ebiederm@...ssion.com, rdreier@...co.com,
	torvalds@...ux-foundation.org, gregkh@...e.de, airlied@...net.ie,
	davej@...hat.com, mingo@...e.hu, tglx@...utronix.de, hpa@...or.com,
	akpm@...ux-foundation.org, arjan@...radead.org,
	jesse.barnes@...el.com, davem@...emloft.net,
	linux-kernel@...r.kernel.org, suresh.b.siddha@...el.com
Subject: Re: [patch 0/4] x86: PAT followup - Incremental changes and bug
 fixes

On Wed, Jan 16, 2008 at 12:33:28PM -0800, Venki Pallipadi wrote:
> This ioremap failing seems to be the real problem. This can be due to
> new tracking of ioremaps introduced by PAT patches. We do not allow
> conflicting ioremaps to same region. Probably that is happening
> in both Sound and sata initialization which results in driver init failing.
> 
> Can you please try the debug patch below over latest x86/mm and boot kernel with
> debug boot option and send us the dmesg from the failure. That will give us
> better info about ioremaps.

Attached is the boot.log with x86/mm as of today (v2.6.24-rc8-720-gd294e9e).

For the failed devices I get:

  sata_sil 0000:00:12.0: version 2.3
  ACPI: PCI Interrupt 0000:00:12.0[A] -> GSI 22 (level, low) -> IRQ 22
  ioremap_nocache: addr c0403000, size 200
  swapper:1 conflicting cache attribute c0403000-c0404000 uncached<->default
  ACPI: PCI interrupt for device 0000:00:12.0 disabled

and

  Advanced Linux Sound Architecture Driver Version 1.0.15 (Tue Nov 20 19:16:42
    2007 UTC).
  ACPI: PCI Interrupt 0000:00:14.5[B] -> GSI 17 (level, low) -> IRQ 17
  ioremap_nocache: addr c0403800, size 100
  swapper:1 conflicting cache attribute c0403000-c0404000 uncached<->default
  AC'97 space ioremap problem
  ACPI: PCI interrupt for device 0000:00:14.5 disabled
  ATI IXP AC97 controller: probe of 0000:00:14.5 failed with error -5

Grepping for ioremap/iounmap gives:

   <snip>
ioremap: addr 77e72d10, size 6ad8
ioremap: addr 77e79982, size 544
ioremap: addr 77e7afc0, size 40
ioremap: addr c0403104, size fc
ioremap: addr 77e7ade1, size 3
ioremap: addr 77e7af04, size 1
ioremap: addr 77e7985c, size f4
ioremap: addr 77e79950, size 32
ioremap: addr 77e79ec6, size c0
ioremap: addr 77e79f86, size 7a
ioremap: addr 77e7af74, size 48
ioremap_nocache: addr c0400000, size 1000
ioremap_nocache: addr c0401000, size 1000
ioremap_nocache: addr c0402000, size 1000
ioremap_nocache: addr c0100000, size 80
ioremap_nocache: addr c0403000, size 200
ioremap_nocache: addr c0402000, size 1000
ioremap_nocache: addr c0400000, size 1000
ioremap_nocache: addr c0401000, size 1000
ioremap_nocache: addr c0403800, size 100

I guess the conflict for sata is
    ioremap: addr c0403104, size fc
    ioremap_nocache: addr c0403000, size 200

But where does the conflict for the sound card
(ioremap_nocache: addr c0403800, size 100)
come from?

And what can I do about conflicting regions?


Regards,

Andreas

View attachment "x86-mm-test-debug.txt" of type "text/plain" (39121 bytes)