Re: [Xen-devel] Possible Regression in "MMCONFIG PCI config space access driver backported from Linux Kernel Ver. 2.6.31.5"

[Simon Horman <horms@xxxxxxxxxxxx>]

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:
> 
> 1) Boot system with following kernel options:
>    root=/dev/mapper/sam-root_x86_64 console=ttyS0 loglevel=8 ro pci=nommconf

     Tested with revision 952:f1bad8203efc
     Successfully booted.

     Config attached as: config-1
     Log attached as: log-1

> 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 \

     Tested with revision 952:f1bad8203efc
     Hung during boot (as expected)

     Config attached as: config-2
     Log attached as: log-2

> 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 \

     Tested with revision 951
     Successfully booted.

     Config attached as: config-3
     Log attached as: log-3

Attachment: config-1
Description: Text document

Attachment: log-1
Description: Text document

Attachment: config-2
Description: Text document

Attachment: log-2
Description: Text document

Attachment: config-3
Description: Text document

Attachment: log-3
Description: Text document

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