[re-adding vfio-users] On Wed, May 18, 2016 at 1:48 PM, Brian Yglesias < [email protected]> wrote:
> I've attached with quiet removed (should have done that already). > > Nothing jumps out at me, hopefully someone else will see something. > > With iommu=pt in lieu of intel_iommu=on the system boots, but no iommu > support. If I append iommu=pt it continues to hard lock. > > I've included two images. > > It does seem to be somehow iommu related. > > I found this post on centos forums: > > https://www.centos.org/forums/viewtopic.php?t=46809 > > That seems to be the same problem with a non-X58 board. Unfortunately, I > don't have the BIOS setting he appears to have used to fix it. > > Thanks for all the help thus far. > > I'm going to post on Gigabyte forums. I've seen on both the archlinux > forum and the former that ppl have gotten iommu working with this board, > which is why I bought it. Not sure what my problem could be yet. > I don't think that centos issue is related, that's a DMA alias issue with broken I/O hardware. What you're seeing is a hang in qi_submit_sync(), which is an impossible hang according the hardware specs, but comes up a fair bit more often than never. AIUI, it means that magic, undocumented bits in hardware aren't set the way they should be and you're going to need to hope for a BIOS update, which is all but impossible on a system as old as X58. Good luck :-\ Alex
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