Re: [PATCH -v2] pci: clear bridge resource size if BIOS assign bad one

From: Bjorn Helgaas
Date: Wed Jun 09 2010 - 19:31:17 EST

On Tuesday, June 08, 2010 05:36:33 pm Yinghai Lu wrote:
> On 06/08/2010 03:48 PM, Bjorn Helgaas wrote:
> > On Tuesday, June 08, 2010 03:43:50 pm Jesse Barnes wrote:
> >
> > In this case, the aperture *size* from the BIOS is actually OK, but
> > the beginning of the aperture overlaps system memory. With Yinghai's
> > patch, we reduce the size and move the start. Windows was able to
> > just move the start of the aperture and preserve the original
> > 0x20000000 size (but I think it had to move something else out of
> > the way).
> are you sure? that looks more aggressive.

I don't have the machine and can't be 100% sure, but based on what
Yannic reported here:,
it looks like Windows moved that aperture.

I haven't used it myself, but possibly a program like SIV
( would give more detailed information
about what Windows is doing.

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