Comment # 14
on bug 101946
from Robin
Created attachment 133108 [details]
case3.sh
So, tinkering with the test script I've only been able to eliminate some
suspicions and invalidate my observation the patch performed better.
I've taken out vfio-pci binding from the loop. It's only used during boot to
keep the GPU free to unbind. So it's not related to vfio-pci's having access in
between binds.
I've made 3 methods for rebinding amdgpu.
amdgpu rmmod > modprobe
remove pci devices > rescan
driver unbind > bind
I've run each of these a few dozen times on each kernel and none of them really
stand out. All of them have a chance to work (as in, ring 1 test failure only)
or to fail.
4.13rc2, drm-next-4.14-wip, drm-next-4.14-wip + patch3 all have this behaviour.
So no I don't think they've helped after all.
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