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

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Message-ID: <54873A45.3050009@gmail.com>
Date:	Tue, 09 Dec 2014 19:07:01 +0100
From:	Marek Kordík <kordikmarek@...il.com>
To:	Yinghai Lu <yinghai@...nel.org>,
	Wei Yang <weiyang@...ux.vnet.ibm.com>,
	Alexey Voronkov <zermond@...il.com>,
	Gavin Shan <gwshan@...ux.vnet.ibm.com>
CC:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] PCI: Clear bridge MEM_64 flag if one child does not support
 it

On 12/09/2014 08:20 AM, Yinghai Lu wrote:
> On Mon, Dec 8, 2014 at 6:26 PM, Wei Yang <weiyang@...ux.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
>
Hi Yinghai,

I have built and booted your branch and it works well. Do you want me to 
attach some logs?
(I am new here and I have read http://www.tux.org/lkml/ and I don't want 
to break some rules for attachment size)

Marek
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