Re: Possible Regression in "MMCONFIG PCI config space access driver backported from Linux Kernel Ver. 2.6.31.5"

[Simon Horman <horms@verge.net.au>]

On Tue, Feb 09, 2010 at 12:16:50PM +0100, Daniel Kiper wrote:
> Hi,
> 
> > the changest ""MMCONFIG PCI config space access driver
> > backported from Linux Kernel Ver. 2.6.31.5" (952:f1bad8203efc)
> > in the linux-2.6.18-xen.hg tree appears to introduce a regression.
> >
> > The problem that I am seeing is that my (x86_64) HP dc7800 no longer boots,
> > hanging during PCI initialisation.
> 
> Could you run following tests:

Sure, I should be able to run them tomorrow.

> 1) Boot system with following kernel options:
>    root=/dev/mapper/sam-root_x86_64 console=ttyS0 loglevel=8 ro pci=nommconf
> 
> 2) Enable CONFIG_ACPI_DEBUG in kernel config, recompile, install and
>    reboot system with following kernel options:
>    root=/dev/mapper/sam-root_x86_64 console=ttyS0 loglevel=8 ro \
>      acpi_dbg_layer=0xffff0000 acpi_dbg_level=0xffffffff
> 
> 3) Remove changest 952:f1bad8203efc from kernel, enable CONFIG_ACPI_DEBUG
>    in kernel config, recompile, install and reboot system with following
>    kernel options:
>    root=/dev/mapper/sam-root_x86_64 console=ttyS0 loglevel=8 ro \
>      acpi_dbg_layer=0xffff0000 acpi_dbg_level=0xffffffff
> 
> Send me all logs and kernel config files from all tests.
> 
> If you have any questions please drop me a line.
> 
> Daniel
>