From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 50921] kvm hangs booting Windows 2000
Date: Sat, 24 Nov 2012 13:44:16 +0000 (UTC)
Message-ID: <20121124134416.E71CD11F7E2@bugzilla.kernel.org>
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https://bugzilla.kernel.org/show_bug.cgi?id=50921
--- Comment #5 from Lucio Crusca 2012-11-24 13:44:16 ---
Here the first tests results:
vbox modules do not make a difference (tried rmmod vboxpci vboxnetadp
vboxnetflt vboxdrv and then kvm ...).
The trace.dat is about 60M, I could upload it somewhere, however I tried
looking at it and I'm reasonably sure it hangs here:
$ trace-cmd report | grep 125\\.332 | tail
kvm-6588 [000] 125.332264: kvm_entry: vcpu 0
kvm-6588 [000] 125.332264: kvm_emulate_insn: 10000:44f8: 75
27
kvm-6588 [000] 125.332265: kvm_entry: vcpu 0
kvm-6588 [000] 125.332266: kvm_emulate_insn: 10000:44fa: 8b
3c
kvm-6588 [000] 125.332267: kvm_entry: vcpu 0
kvm-6588 [000] 125.332267: kvm_emulate_insn: 10000:44fc: 46
kvm-6588 [000] 125.332268: kvm_entry: vcpu 0
kvm-6588 [000] 125.332269: kvm_emulate_insn: 10000:44fd: 46
kvm-6588 [000] 125.332269: kvm_entry: vcpu 0
kvm-6588 [000] 125.332270: kvm_emulate_insn: 10000:44fe: 8b
14
$ trace-cmd report | grep 125\\.333 | head
kvm-6588 [000] 125.333950: kvm_emulate_insn: 10000:4782: d5
kvm-6588 [000] 125.333951: kvm_emulate_insn: 10000:4782: d5
kvm-6588 [000] 125.333951: kvm_emulate_insn: 10000:4782: d5
kvm-6588 [000] 125.333952: kvm_emulate_insn: 10000:4782: d5
kvm-6588 [000] 125.333953: kvm_emulate_insn: 10000:4782: d5
kvm-6588 [000] 125.333953: kvm_emulate_insn: 10000:4782: d5
kvm-6588 [000] 125.333954: kvm_emulate_insn: 10000:4782: d5
kvm-6588 [000] 125.333954: kvm_emulate_insn: 10000:4782: d5
kvm-6588 [000] 125.333955: kvm_emulate_insn: 10000:4782: d5
kvm-6588 [000] 125.333955: kvm_emulate_insn: 10000:4782: d5
The rest of the log is about 5 seconds of d5 d5 d5 d5...
As for the bisect, I'm not sure of a good commit in the vanilla tree. By now
the only working kernel I have is a debian one.
While doing these test a suspect came to my mind: a difference between mine and
debian kernels is that I configure mine preemptible low latency desktop. Could
that be the cause?
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