Peter Xu <pet...@redhat.com> writes: > On Thu, Mar 02, 2017 at 05:20:19PM -0500, Bandan Das wrote: >> Jintack Lim <jint...@cs.columbia.edu> writes: >> >> > [cc Bandan] >> > ... >> >> Jintack, any progress with this ? >> >> I am testing on a X540-AT2 and I see a different behavior. It appears >> config succeeds but the driver keeps resetting the device due to a Tx >> hang: >> >> [ 568.612391 ] ixgbe 0000:00:03.0 enp0s3: tx hang 38 detected on queue 0, >> resetting adapter >> [ 568.612393 ] ixgbe 0000:00:03.0 enp0s3: initiating reset due to tx >> timeout >> [ 568.612397 ] ixgbe 0000:00:03.0 enp0s3: Reset adapter >> >> This may be device specific but I think the actual behavior you see is >> also dependent on the ixgbe driver in the guest. Are you on a recent >> kernel ? Also, can you point me to the hack (by Peter) that you have >> mentioned above ? > > Hi, Bandan, > > Are you using the vtd vfio v7 series or another branch?
Thanks for the tip. Jintack pointed me to your repo and I am using v7 from there. > If it's the upstream one... just a note that we need to make sure > "-device intel-iommu" be the first device specified in QEMU command > line parameters (need to before "-device vfio-pci,..."). Thanks, > > -- peterx
