linux-kernel - Re: [bisected][resend] pnp: Huge number of "io resource overlap" messages

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Date:	Tue, 9 Sep 2008 18:26:17 +0200
From:	Frans Pop <elendil@...net.nl>
To:	Bjorn Helgaas <bjorn.helgaas@...com>
Cc:	linux-kernel@...r.kernel.org, Rene Herman <rene.herman@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [bisected][resend] pnp: Huge number of "io resource overlap" messages

Thanks for your quick replies Bjorn and Rene!

On Tuesday 09 September 2008, Bjorn Helgaas wrote:
> On Tuesday 09 September 2008 04:50:06 am Frans Pop wrote:
> > The only thing I used to get for pnp 00:08 on my Toshiba Satellite
> > A40 up to 2.6.26 was this single line:
> > pnp 00:08: can't add resource for IO 0xa8-0xa9
[...]
> > Was it expected that that change could lead to a message
> > disappearing? I don't really read that from the commit description.
>
> Yep.  This commit removed the fixed limit (40), so we shouldn't see
> messages like that any more.  The commit log mentioned these:

Right, that explains. Thanks.
The old message text led me to think that only that particular resource 
was problematic, while actually it was the listed one and all following. 
The message you did quote was clearer in that respect.

> What do "lspci -vv" and /proc/ioports and /proc/iomem show for you?

Thanks for the background info and data for comparison.
Here's what I have (full info attached). AFAICT it looks equally sane and 
consistent.

00:1f.5 Multimedia audio controller: Intel Corporation 82801DB/DBL/DBM 
(ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller [8086:24c5] (rev 03)
        Region 0: I/O ports at 1000 [size=256]
        Region 1: I/O ports at 1880 [size=64]
        Region 2: Memory at 28080800 (32-bit, non-prefetchable) [size=512]
        Region 3: Memory at 28080a00 (32-bit, non-prefetchable) [size=256]

00:1f.6 Modem: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) 
AC'97 Modem Controller [8086:24c6] (rev 03)
        Region 0: I/O ports at 1400 [size=256]
        Region 1: I/O ports at 1800 [size=128]

/proc/ioports:
1000-10ff : 0000:00:1f.5
  1000-10ff : Intel 82801DB-ICH4
1400-14ff : 0000:00:1f.6
  1400-14ff : Intel 82801DB-ICH4 Modem
1800-187f : 0000:00:1f.6
  1800-187f : Intel 82801DB-ICH4 Modem
1880-18bf : 0000:00:1f.5
  1880-18bf : Intel 82801DB-ICH4

/proc/iomem:
28080800-280809ff : 0000:00:1f.5
  28080800-280809ff : Intel 82801DB-ICH4
28080a00-28080aff : 0000:00:1f.5
  28080a00-28080aff : Intel 82801DB-ICH4

Cheers,
FJP


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