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QEMU lockup with excessive EPT_VIOLATION errors in perf trace


From: afaas
Subject: QEMU lockup with excessive EPT_VIOLATION errors in perf trace
Date: Tue, 27 Jun 2023 23:31:09 +0200 (CEST)

Hello,

Am curious if anyone has ran into this issue and what your resolution might have been? perf kvm stat live -a -d 5 -p 1234

Analyze events for pid(s) 1234, all VCPUs:

             VM-EXIT    Samples  Samples%     Time%    Min Time    Max Time         Avg time

       EPT_VIOLATION     345604    99.76%    99.20%      0.46us   1574.54us      7.33us ( +-   1.55% )
  EXTERNAL_INTERRUPT        819     0.24%     0.80%      1.05us   1110.45us     24.91us ( +-  10.90% )

The QEMU machine becomes unresponsive and just locks up with excessive EPT_VIOLATION being thrown from the perf.

Underlying kernel is 6.1.12 and qemu is 7.2.2.

Thanks!



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