From: "Marcin Gibuła" <m.gibula@beyond.pl>
To: Eduardo Habkost <ehabkost@redhat.com>
Cc: Andrey Korolyov <andrey@xdel.ru>, Fam Zheng <famz@redhat.com>,
Marcelo Tosatti <mtosatti@redhat.com>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
Amit Shah <amit.shah@redhat.com>,
Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: [Qemu-devel] latest rc: virtio-blk hangs forever after migration
Date: Fri, 10 Oct 2014 09:33:04 +0200 [thread overview]
Message-ID: <54378BB0.5060509@beyond.pl> (raw)
In-Reply-To: <20141009190709.GC23667@thinpad.lan.raisama.net>
> Does anybody know why the APIC state loaded by the first call to
> kvm_arch_get_registers() is wrong, in the first place? What exactly is
> different in the APIC state in the second kvm_arch_get_registers() call,
> and when/why does it change?
>
> If cpu_synchronize_state() does the wrong thing if it is called at the
> wrong moment, then we may have other hidden bugs, because the user can
> trigger cpu_synchronize_all_states() calls arbitrarily using monitor
> commands.
My guess is, it's not wrong, it's just outdated when second call
occures. Maybe it's an ordering issue - could kvmclock state change
handler be called before other activity is suspended (?)
I didn't pursue it further, cause I don't know too much (anything
really) about QEMU/APIC internals and how to track its changes.
--
mg
next prev parent reply other threads:[~2014-10-10 7:33 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-13 12:28 [Qemu-devel] latest rc: virtio-blk hangs forever after migration Andrey Korolyov
2014-07-13 15:29 ` Andrey Korolyov
2014-07-15 15:57 ` Paolo Bonzini
2014-07-15 17:32 ` Andrey Korolyov
2014-07-15 17:39 ` Andrey Korolyov
2014-07-15 5:03 ` Amit Shah
2014-07-15 6:52 ` Andrey Korolyov
2014-07-15 14:01 ` Andrey Korolyov
2014-07-15 21:09 ` Marcelo Tosatti
2014-07-15 21:25 ` Andrey Korolyov
2014-07-15 22:01 ` Paolo Bonzini
2014-07-15 23:40 ` Andrey Korolyov
2014-07-15 23:47 ` Marcelo Tosatti
2014-07-16 1:16 ` Marcelo Tosatti
2014-07-16 8:38 ` Andrey Korolyov
2014-07-16 11:52 ` Marcelo Tosatti
2014-07-16 13:24 ` Andrey Korolyov
2014-07-16 18:25 ` Andrey Korolyov
2014-07-16 21:28 ` Marcin Gibuła
2014-07-16 21:36 ` Andrey Korolyov
2014-07-17 9:49 ` Marcin Gibuła
2014-07-17 11:20 ` Marcin Gibuła
2014-07-17 11:54 ` Marcin Gibuła
2014-07-17 12:06 ` Andrey Korolyov
2014-07-17 13:25 ` Marcin Gibuła
2014-07-17 19:18 ` Dr. David Alan Gilbert
2014-07-17 20:33 ` Marcin Gibuła
2014-07-17 20:50 ` Andrey Korolyov
2014-07-18 8:21 ` Marcin Gibuła
2014-07-18 8:36 ` Andrey Korolyov
2014-07-18 8:44 ` Marcin Gibuła
2014-07-18 8:51 ` Paolo Bonzini
2014-07-18 8:48 ` Paolo Bonzini
2014-07-18 8:57 ` Amit Shah
2014-07-18 9:32 ` Marcin Gibuła
2014-07-18 9:37 ` Paolo Bonzini
2014-07-18 9:48 ` Marcin Gibuła
2014-07-29 16:58 ` Paolo Bonzini
2014-07-30 12:02 ` Marcin Gibuła
2014-07-30 13:38 ` Paolo Bonzini
2014-07-30 22:12 ` Marcin Gibuła
2014-07-31 11:27 ` Marcin Gibuła
2014-08-04 16:30 ` Marcin Gibuła
2014-08-04 18:30 ` Paolo Bonzini
2014-08-08 21:37 ` Marcelo Tosatti
2014-08-09 6:35 ` Paolo Bonzini
2014-08-21 15:48 ` Andrey Korolyov
2014-08-21 16:41 ` Andrey Korolyov
2014-08-21 16:44 ` Paolo Bonzini
2014-08-21 17:51 ` Andrey Korolyov
2014-08-22 16:44 ` Andrey Korolyov
2014-08-22 17:45 ` Marcelo Tosatti
2014-08-22 18:39 ` Andrey Korolyov
2014-08-22 19:05 ` Marcelo Tosatti
2014-08-22 19:05 ` Marcelo Tosatti
2014-08-22 19:51 ` Andrey Korolyov
2014-08-22 21:01 ` Marcelo Tosatti
2014-08-22 22:21 ` Andrey Korolyov
2014-08-24 16:19 ` Andrey Korolyov
2014-08-24 16:35 ` Paolo Bonzini
2014-08-24 16:57 ` Andrey Korolyov
2014-08-24 18:51 ` Andrey Korolyov
2014-08-24 20:14 ` Andrey Korolyov
2014-08-25 10:45 ` Paolo Bonzini
2014-08-25 10:51 ` Andrey Korolyov
2014-09-04 16:38 ` Marcelo Tosatti
2014-09-04 16:52 ` Andrey Korolyov
2014-09-04 18:54 ` Marcelo Tosatti
2014-09-04 18:54 ` Marcelo Tosatti
2014-09-04 19:13 ` Andrey Korolyov
2014-08-22 17:55 ` Paolo Bonzini
2014-10-09 19:07 ` Eduardo Habkost
2014-10-10 7:33 ` Marcin Gibuła [this message]
2014-10-11 12:58 ` Eduardo Habkost
2014-07-16 7:35 ` Marcin Gibuła
2014-07-16 12:00 ` Marcelo Tosatti
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