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Groups > linux.debian.kernel > #59895

Bug#885166: instability with 4.14 regarding KVM virtualization

From Marc Haber <mh+debian-bugs@zugschlus.de>
Newsgroups linux.debian.bugs.dist, linux.debian.kernel
Subject Bug#885166: instability with 4.14 regarding KVM virtualization
Date 2018-01-08 10:00 +0100
Message-ID <v5BrH-3wY-1@gated-at.bofh.it> (permalink)
References <v0APD-4bT-1@gated-at.bofh.it> <v0J6x-1pO-19@gated-at.bofh.it> <v0APD-4bT-1@gated-at.bofh.it> <v0J6x-1pO-19@gated-at.bofh.it>
Organization linux.* mail to news gateway

Cross-posted to 2 groups.

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On Mon, Dec 25, 2017 at 10:02:48PM +0000, Ben Hutchings wrote:
> Given that commit fb1522e099f0 was merged after -rc7 I assume it's an
> important fix, though the commit message doesn't spell that out.  So I
> think that whenever bisect asks you to test a version that doesn't
> contain it, you should cherry-pick it first to avoid the other bug.

After two more weeks, I can now confirm that cherry-picking fb1522e099f0
onto earlier 4.13-rc kernels makes things _WORSE_.

I believe that
  - plain 4.13-rc4 works fine and allows stable usage of KVM
    virtualization
  - 4.13-rc4 with cherry-picked fb1522e099f0 is bad, causing random
    segfaults and file-system corruption in VMs under disk and CPU load
  - 4.13-rc5 is bad either way

I will start bisecting between 4.13-rc4 and 4.13-rc5, hoping that this
will yield better results. Since I have to wait between three to five
days to flag a kernel as "good" without too much doubt, and bisect
4.13-rc4..4.13-rc5 will take "roughly 7 steps".

I am open to additional suggestions.

Greetings
Marc


-- 
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Marc Haber         | "I don't trust Computers. They | Mailadresse im Header
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Thread

Bug#885166: instability with 4.14 regarding KVM virtualization Marc Haber <mh+debian-bugs@zugschlus.de> - 2017-12-25 14:20 +0100
  Bug#885166: instability with 4.14 regarding KVM virtualization Ben Hutchings <ben@decadent.org.uk> - 2017-12-25 23:10 +0100
    Bug#885166: instability with 4.14 regarding KVM virtualization Marc Haber <mh+debian-bugs@zugschlus.de> - 2017-12-27 12:30 +0100
      Bug#885166: instability with 4.14 regarding KVM virtualization Jonathan Nieder <jrnieder@gmail.com> - 2017-12-27 18:40 +0100
      Bug#885166: instability with 4.14 regarding KVM virtualization Ben Hutchings <ben@decadent.org.uk> - 2017-12-27 20:50 +0100
    Bug#885166: instability with 4.14 regarding KVM virtualization Marc Haber <mh+debian-bugs@zugschlus.de> - 2018-01-08 10:00 +0100
      Bug#885166: instability with 4.14 regarding KVM virtualization Marc Haber <mh+debian-bugs@zugschlus.de> - 2018-02-11 14:50 +0100
        Bug#885166: instability with 4.14 regarding KVM virtualization Salvatore Bonaccorso <carnil@debian.org> - 2018-02-18 10:20 +0100
          Bug#885166: instability with 4.14 regarding KVM virtualization Marc Haber <mh+debian-bugs@zugschlus.de> - 2018-02-18 11:40 +0100
            Bug#885166: instability with 4.14 regarding KVM virtualization Salvatore Bonaccorso <carnil@debian.org> - 2018-02-19 06:40 +0100
              Bug#885166: instability with 4.14 regarding KVM virtualization Marc Haber <mh+debian-bugs@zugschlus.de> - 2018-02-21 16:10 +0100
                Bug#885166: instability with 4.14 regarding KVM virtualization Marc Haber <mh+debian-bugs@zugschlus.de> - 2018-02-23 09:20 +0100

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