From mboxrd@z Thu Jan  1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 153571] 100% CPU usage on guest VM
Date: Sun, 05 Feb 2017 11:01:57 +0000
Message-ID: <bug-153571-28872-frfiFWPXat@https.bugzilla.kernel.org/>
References: <bug-153571-28872@https.bugzilla.kernel.org/>
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https://bugzilla.kernel.org/show_bug.cgi?id=153571

--- Comment #5 from Laurentiu Soica <laurentiu@soica.ro> ---
I wasn't able to boot with the kernel from koji.fedoraproject.org. Instead I
built the 4.9.6 from sources.

Even if for now the CPU usage is not 100% (but still very high), the profiling
looks similar, this time the the load is on queued_spin_lock_slowpath:

  Children      Self  Command          Shared Object               Symbol
-   69.38%    69.38%  qemu-kvm         [kernel.vmlinux]            [k]
queued_spin_lock_slowpath
- queued_spin_lock_slowpath
      - _raw_spin_lock
         + 46.76% kvm_mmu_sync_roots
         + 29.95% mmu_free_roots
         + 23.12% kvm_mmu_load

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