linux-kernel - Re: SR-IOV problem with Intel 82599EB (not enough MMIO resources for SR-IOV)

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Date:	Tue, 13 Nov 2012 11:40:04 -0500
From:	Don Dutile <ddutile@...hat.com>
To:	"Li, Sibai" <sibai.li@...el.com>
CC:	Jason Gao <pkill.2012@...il.com>,
	"bhelgaas@...gle.com" <bhelgaas@...gle.com>,
	"Rose, Gregory V" <gregory.v.rose@...el.com>,
	"Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	netdev <netdev@...r.kernel.org>, kvm <kvm@...r.kernel.org>,
	"e1000-devel@...ts.sourceforge.net" 
	<e1000-devel@...ts.sourceforge.net>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Yinghai Lu <yinghai@...nel.org>
Subject: Re: SR-IOV problem with Intel 82599EB (not enough MMIO resources
 for SR-IOV)

On 11/13/2012 11:04 AM, Li, Sibai wrote:
>
>
>> -----Original Message-----
>> From: Jason Gao [mailto:pkill.2012@...il.com]
>> Sent: Tuesday, November 13, 2012 5:38 AM
>> To: bhelgaas@...gle.com; Rose, Gregory V; Li, Sibai
>> Cc: ddutile@...hat.com; Kirsher, Jeffrey T; linux-kernel; netdev; kvm; e1000-
>> devel@...ts.sourceforge.net; linux-pci@...r.kernel.org; Yinghai Lu
>> Subject: Re: SR-IOV problem with Intel 82599EB (not enough MMIO resources
>> for SR-IOV)
>>
>> I'm very sorry for delayed reply.now SR-IOV works for me in Centos 6.3,thank all
>> of you.
>>
>>
>> On Fri, Nov 9, 2012 at 11:26 PM, Bjorn Helgaas<bhelgaas@...gle.com>  wrote:
>>> Linux normally uses the resource assignments done by the BIOS, but it
>>> is possible for the kernel to reassign those.  We don't have good
>>> automatic support for that yet, but on a recent upstream kernel, you
>>> can try "pci=realloc".  I doubt this option is in CentOS 6.3, though
>>
>> Thank you very much,I try "pci=realloc" in Centos 6.3,and now it works for me.
>>
>>
>>
>> On Sat, Nov 10, 2012 at 2:08 AM, Li, Sibai<sibai.li@...el.com>  wrote:
>>> DellR710 with the latest BIOS should work fine for SR-IOV. My BIOS is
>>> v.6.3.0 and release date is 07/24/2012 Please check if you configured
>> intel_iommu=on in the grub.conf file.
>>> If you did, check your kernel .config file under Device Drivers->  IOMMU
>> Hardware support->enable Support for Intel IOMMU using DMA remapping
>> Devices, enable Intel DMA Remapping Devices by Default, enable Support for
>> Interrupt Remapping.
>>
>> thank you Sibai,Our server "Dell R710",its BIOS version is just
>> v.6.3.0 and release date is 07/24/2012,and I also configured intel_iommu=on in
>> the grub.conf file,but I can't find these IOMMU options in "Device Drivers" in my
Sibai is referring to kernel config options.  RHEL6.3 has the IOMMU options built into
the kernel, but not enabled by default -- have to add 'intel_iommu=on' to the kernel
cmdline to enable IOMMU. SRIOV support (CONFIG_IOV) is built into the RHEL6.3 kernel as well.

>> kernel(2.6.32-279) .config file , btw my os is Centos 6.3(RHEL6.3),although the
>> problem solved,I'd like to know what's your os version ,kernel version?
>
> I am using RHEL6.3 with unstable kernel 3.7.0-rc
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