Re: Linux 2.6.31-rc4: strange change in iomem allocation

From: Jesse Barnes
Date: Thu Jul 23 2009 - 11:58:07 EST


On Thu, 23 Jul 2009 07:42:28 -0700
Yinghai Lu <yhlu.kernel@xxxxxxxxx> wrote:

> On Thu, Jul 23, 2009 at 7:14 AM, Frans Pop<elendil@xxxxxxxxx> wrote:
> > I'm seeing the following change in dmesg between -rc3 and -rc4:
> > -system 00:0c: iomem range 0xfec00000-0xfec000ff has been reserved
> > +system 00:0c: iomem range 0xfec00000-0xfec000ff could not be
> > reserved
> >
> > There is nothing in the earlier part of dmesg that would explain
> > this change.
> >
> > The change is also visible in /proc/iomem:
> > Âfec00000-fec00fff : IOAPIC 0
> > Â fec00000-fec00fff : reserved
> > - Â Âfec00000-fec000ff : pnp 00:0c
> >
> > I somewhat suspect 857fdc53a0a90c3ba7fcf5b1fb4c7a62ae03cf82:
> > Â Âx86/pci: insert ioapic resource before assigning unassigned
> > resources
> >
> > System is HP 2510p notebook (x86_64).
>
> should be ok. we don't need that
> fec00000-fec000ff : pnp 00:0c

So the PNP ranges are duplicating the IOAPIC range? Seems harmless
enough...

--
Jesse Barnes, Intel Open Source Technology Center
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