From: Paolo Bonzini <pbonzini@redhat.com>
To: Andrey Korolyov <andrey@xdel.ru>
Cc: "Amit Shah" <amit.shah@redhat.com>, "Fam Zheng" <famz@redhat.com>,
"Marcelo Tosatti" <mtosatti@redhat.com>,
"Marcin Gibuła" <m.gibula@beyond.pl>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] latest rc: virtio-blk hangs forever after migration
Date: Thu, 21 Aug 2014 18:44:49 +0200 [thread overview]
Message-ID: <53F62201.1050805@redhat.com> (raw)
In-Reply-To: <CABYiri9qrArxRnigO4vBbG=vMTH_5e3ADYVJRLTctLFpDU=sjg@mail.gmail.com>
Il 21/08/2014 18:41, Andrey Korolyov ha scritto:
> Sorry, the test series revealed that the problem is still here, but
> with lower hit ratio with modified 2.1-HEAD using selected argument
> set. The actual root of the issue is in '-cpu
> qemu64,hv_time,hv_relaxed,hv_vapic,hv_spinlocks=0x1000'
> Windows-specific addition which can be traded for some idle CPU
> consumption. Reproduction of bug is quite simple - fire up Windows VM,
> migrate it two-three times and then try to log in using rdesktop/VNC -
> if disk is frozen, login progress will freeze too. It is not so easy
> to detect blocked I/O on Windows in the interactive session due to
> lack of soft lockup warning equivalent, so one can try such a sequence
> to check.
What kernel version?
The ioapic patches at http://thread.gmane.org/gmane.linux.kernel/1671045
fixed exactly a Windows-specific hang in migration. But it didn't require
Hyper-V enlightenments.
Paolo
next prev parent reply other threads:[~2014-08-21 16:44 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 [this message]
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
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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