With a revert of b6b8a145 ('Rework interception of IRQs and NMIs'), the
issue does not occur readily with the test case. I was able to run for
1+ hour. Generally I can reproduce within 15m.
With 9242b5b6 ('KVM: x86: Check for nested events if there is an
injectable interrupt') applied, I can run for 1+ hour without issue.
Current 3.13.0 patchlevel is in between those two commits which allows
for this bug to reproduce easily.
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https://bugs.launchpad.net/bugs/1413540
Title:
Trusty soft lockup issues with nested KVM
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