[vfio-users] 1 GB hugepages cause host crash on guest shutdown with some GPUs

[Okky Hendriansyah]

On December 1, 2015 at 15:41:06, Dan Ziemba (zman0900 at gmail.com) wrote:
I think I might have just figured out the issue.  My modprobe option 
for vfio-pci is wrong for the sound card part of the GPU.  Should be 
1002:aac8, not 1002:aac0.  This led to that device not being bound to 
vfio-pci, so libvirt would do it automatically when starting/stopping 
the vm.  Apparently unbinding the sound card part of the GPU after use 
does not work well.  After fixing the option and rebooting everything, 
VM shutdown worked after starting it up and running a benchmark for a 
few minutes.  So far so good, hopefully this problem is all user error. 

Dan 
Good to hear that. When all things went well, can you compare the performance between 1 GB and 2 MB hugepages? If 1 GB is better (even the slightest), I’d like to try again using 1 GB hugepages.

-- 
Okky Hendriansyah
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