Messages in this thread | | | Date | Mon, 12 Nov 2012 14:46:59 -0500 | From | Don Dutile <> | Subject | Re: SR-IOV problem with Intel 82599EB (not enough MMIO resources for SR-IOV) |
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On 11/09/2012 10:26 AM, Bjorn Helgaas wrote: > [+ linux-pci, Yinghai] > > On Thu, Nov 8, 2012 at 8:59 PM, Jason Gao<pkill.2012@gmail.com> wrote: >>> The BIOS in your machine doesn't support SR-IOV. You'll need to ask the manufacturer for a BIOS upgrade, if in fact one is available. Sometimes they're not. >> >> very thanks Greg,my server Dell R710 with latest BIOS version and >> option for SR-IOV(SR-IOV Global Enable->Enabled) opened,I'm confused >> that Does R710 provide full support for SR-IOV, kernel or ixgbe >> driver's bug? but I'm not sure where the problem lies,anyone has any >> experience about this? . > > 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. > Try moving the device into a different slot. You may be trying it in a non-ARI slot in the 710; that is a problem in RHEL6 (needing to realloc bus &/or mem-space). A non-ARI slot will want to use one bus number per VF.... which will be problematic. I know I've seen ixgbe's (& their vfs's) working on a dell 710; but they may also be one of those systems that has a slot off the ich10 with no ARI support.
> If an upstream kernel with "pci=realloc" still doesn't work, please > post the entire dmesg log. > -- > To unsubscribe from this list: send the line "unsubscribe linux-pci" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html
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