Re: SR-IOV problem with Intel 82599EB (not enough MMIO resourcesfor SR-IOV)

[Don Dutile]

On 11/13/2012 11:04 AM, Li, Sibai wrote:
> > -----Original Message-----
> > From: Jason Gao [mailto:pkill.2012@xxxxxxxxx]
> > Sent: Tuesday, November 13, 2012 5:38 AM
> > To: bhelgaas@xxxxxxxxxx; Rose, Gregory V; Li, Sibai
> > Cc: ddutile@xxxxxxxxxx; Kirsher, Jeffrey T; linux-kernel; netdev; kvm; e1000-
> > devel@xxxxxxxxxxxxxxxxxxxxx; linux-pci@xxxxxxxxxxxxxxx; 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@xxxxxxxxxx>  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@xxxxxxxxx>  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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