Re: [PATCH] PCI: Clear bridge MEM_64 flag if one child does not support it

Yinghai Lu
2014-12-09T07:21:02Z

On Mon, Dec 8, 2014 at 6:26 PM, Wei Yang <weiyang@linux.vnet.ibm.com> wrote:
> On Tue, Dec 09, 2014 at 11:11:19AM +1100, Gavin Shan wrote:
>>
>>I'm going to give it a spin and Richard, could you please apply Yinghai's
>>patch to see if your SRIOV code can work properly?
>>
>
> I did a quick test on my machine. This patch doesn't affect the MMIO
> allocation on out platform, so SRIOV works fine.
>
> I will spend more time to read the patch to get more understanding about the
> problem.

Hi Marek,

Can you boot following branch with "debug ignore_loglevel pci=realloc"
on your setup?

git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git
for-pci-allocate-fit-3.18

it has
8f74af9: PCI, x86: Allocate mmio near end of free range
1ff91c1: PCI: Don't allocate small resource in big free space.
108b43b: resources: Add allocate_resource_fit()
b6a22f0: resources: Make find_resource could return just fit resource
cf50e16: resources: Split out __allocate_resource()

on top the v3.18, and it will allocate resource in fit way.

Thanks

Yinghai