Bug#961676: 5.6 kernel crashes host when using VFIO on KVM guests

From	Simon John <debian@the-jedi.co.uk>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#961676: 5.6 kernel crashes host when using VFIO on KVM guests
Date	2020-06-28 02:00 +0200
Message-ID	<AmsTL-z0-1@gated-at.bofh.it> (permalink)
References	(6 earlier) <AgDRT-UO-3@gated-at.bofh.it> <Ahn8m-2Y7-7@gated-at.bofh.it> <Ahn8m-2Y7-7@gated-at.bofh.it> <Aba4a-2Il-7@gated-at.bofh.it> <Ahn8m-2Y7-7@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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Bug still exists in today's 5.7 kernel, however it took long enough to 
trigger that it managed to write some logs:

https://gist.github.com/sej7278/766043a69c76308f84cfa14b3f3a924f

"BUG: soft lockup - CPU#0 stuck for 22s!" seems to go back to 2013 or 
earlier e.g. https://bugzilla.redhat.com/show_bug.cgi?id=1038929

kvm-pit seemed to be eating a lot of cpu, qemu went defunct, macos guest 
got a little further into its boot sequence.

Can we upgrade this bug so it gets some visibility, that's two major 
kernel versions its not been fixed in now, let alone commented on.

-- 
Simon John

Thread

5.6 kernel crashes host when using VFIO on KVM guests Simon John <debian@the-jedi.co.uk> - 2020-05-25 22:40 +0200
  Bug#961676: 5.6 kernel crashes host when using VFIO on KVM guests Salvatore Bonaccorso <carnil@debian.org> - 2020-05-27 21:40 +0200
    Processed: Re: 5.6 kernel crashes host when using VFIO on KVM guests "Debian Bug Tracking System" <owner@bugs.debian.org> - 2020-05-27 21:40 +0200
    Bug#961676: 5.6 kernel crashes host when using VFIO on KVM guests Simon John <debian@the-jedi.co.uk> - 2020-05-27 22:50 +0200
      Bug#961676: 5.6 kernel crashes host when using VFIO on KVM guests Simon John <debian@the-jedi.co.uk> - 2020-06-12 00:30 +0200
        Bug#961676: 5.6 kernel crashes host when using VFIO on KVM guests Simon John <debian@the-jedi.co.uk> - 2020-06-14 00:50 +0200
          Bug#961676: 5.6 kernel crashes host when using VFIO on KVM guests Simon John <debian@the-jedi.co.uk> - 2020-06-28 02:00 +0200
            Bug#961676: 5.6 kernel crashes host when using VFIO on KVM guests Simon John <debian@the-jedi.co.uk> - 2020-06-28 02:10 +0200
              Bug#961676: 5.6 kernel crashes host when using VFIO on KVM guests Salvatore Bonaccorso <carnil@debian.org> - 2020-06-28 10:50 +0200
                Bug#961676: 5.6 kernel crashes host when using VFIO on KVM guests Simon John <simon@the-jedi.co.uk> - 2020-06-28 12:10 +0200
                Bug#961676: 5.6 kernel crashes host when using VFIO on KVM guests Simon John <debian@the-jedi.co.uk> - 2020-07-03 23:50 +0200
                Bug#961676: 5.6 kernel crashes host when using VFIO on KVM guests Simon John <debian@the-jedi.co.uk> - 2020-07-19 00:20 +0200
                Bug#961676: 5.6 kernel crashes host when using VFIO on KVM guests Simon John <debian@the-jedi.co.uk> - 2020-07-19 01:40 +0200
                Bug#961676: 5.6 kernel crashes host when using VFIO on KVM guests Simon John <debian@the-jedi.co.uk> - 2020-07-19 01:50 +0200
                Bug#961676: 5.6 kernel crashes host when using VFIO on KVM guests Simon John <debian@the-jedi.co.uk> - 2020-07-19 18:00 +0200
    Bug#961676: marked as done (5.6 kernel crashes host when using  VFIO on KVM guests) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2020-07-19 18:20 +0200

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