From: Paolo Bonzini <pbonzini@redhat.com>
To: Avi Kivity <avi@redhat.com>
Cc: Jan Kiszka <jan.kiszka@siemens.com>,
Liu Ping Fan <pingfank@linux.vnet.ibm.com>,
Liu Ping Fan <qemulist@gmail.com>,
Anthony Liguori <anthony@codemonkey.ws>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] [PATCH 10/10] qdev: fix create in place obj's life cycle problem
Date: Mon, 27 Aug 2012 23:34:32 +0200 [thread overview]
Message-ID: <503BE7E8.2000109@redhat.com> (raw)
In-Reply-To: <503BDF85.80802@redhat.com>
Il 27/08/2012 22:58, Avi Kivity ha scritto:
>> > It's best to start this conversion using very coarse locking. There's
>> > no need to start with ultra fine grain locking.
> How does it work? You have to drop this main loop lock to dispatch the
> callback, so the data structure you use for dispatch is no longer protected.
It is protected by a mixture of reference counting, thread-local storage and
careful coding to take care of re-entrancy.
I'm not too sure that we can use it, though. Mostly because of the reasons Jan
mentioned (it may also not be precise enough, but we can fix that with our own
GSource wrapping POSIX real-time timers or Linux timerfds).
Paolo
next prev parent reply other threads:[~2012-08-27 21:34 UTC|newest]
Thread overview: 82+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-24 9:49 [Qemu-devel] [PATCH 0/10] rework on hot unplug Liu Ping Fan
2012-08-24 9:49 ` [Qemu-devel] [PATCH 01/10] qom: add, remove of link property need to ref, unref its target Liu Ping Fan
2012-08-24 14:52 ` Paolo Bonzini
2012-08-24 9:49 ` [Qemu-devel] [PATCH 02/10] qdev: change iterator callback seq Liu Ping Fan
2012-08-24 9:49 ` [Qemu-devel] [PATCH 03/10] qom: export object_property_is_child, object_property_is_link Liu Ping Fan
2012-08-24 14:51 ` Paolo Bonzini
2012-08-25 7:43 ` liu ping fan
2012-08-25 8:04 ` Blue Swirl
2012-08-24 9:49 ` [Qemu-devel] [PATCH 04/10] qdev: introduce new interface to remove composite sub-tree Liu Ping Fan
2012-08-24 9:49 ` [Qemu-devel] [PATCH 05/10] qdev: finalize of qbus, qdev will not the right place to free children Liu Ping Fan
2012-08-24 14:50 ` Paolo Bonzini
2012-08-24 9:49 ` [Qemu-devel] [PATCH 06/10] qom: expose object_property_del_child Liu Ping Fan
2012-08-24 14:44 ` Paolo Bonzini
2012-08-24 9:49 ` [Qemu-devel] [PATCH 07/10] unplug: using new intf qdev_delete_subtree in acpi_piix_eject_slot Liu Ping Fan
2012-08-24 10:24 ` Paolo Bonzini
2012-08-25 7:05 ` liu ping fan
2012-08-24 9:49 ` [Qemu-devel] [PATCH 08/10] qdev: rename qdev_unplug to qdev_unplug_req Liu Ping Fan
2012-08-24 14:48 ` Paolo Bonzini
2012-08-24 9:49 ` [Qemu-devel] [PATCH 09/10] mon: release dev's ref hold by qdev_get_peripheral Liu Ping Fan
2012-08-24 9:49 ` [Qemu-devel] [PATCH 10/10] qdev: fix create in place obj's life cycle problem Liu Ping Fan
2012-08-24 14:42 ` Paolo Bonzini
2012-08-25 7:42 ` liu ping fan
2012-08-27 7:01 ` Paolo Bonzini
2012-08-27 7:47 ` Jan Kiszka
2012-08-27 8:17 ` liu ping fan
2012-08-27 8:27 ` Jan Kiszka
2012-08-27 17:09 ` Avi Kivity
2012-08-27 17:14 ` Jan Kiszka
2012-08-27 18:09 ` Avi Kivity
2012-08-27 18:17 ` Jan Kiszka
2012-08-27 18:20 ` Avi Kivity
2012-08-27 18:39 ` Jan Kiszka
2012-08-27 18:52 ` Avi Kivity
2012-08-27 19:38 ` Jan Kiszka
2012-08-27 20:53 ` Avi Kivity
2012-08-28 1:01 ` Jan Kiszka
2012-08-29 17:13 ` Avi Kivity
2012-08-29 17:21 ` Jan Kiszka
2012-08-29 17:27 ` Avi Kivity
2012-08-29 17:41 ` Jan Kiszka
2012-09-03 9:09 ` Avi Kivity
2012-08-28 3:09 ` liu ping fan
2012-08-28 3:38 ` liu ping fan
2012-08-28 9:42 ` Jan Kiszka
2012-08-28 10:05 ` Paolo Bonzini
2012-08-29 17:23 ` Avi Kivity
2012-08-29 17:30 ` Jan Kiszka
2012-08-29 17:40 ` Avi Kivity
2012-08-29 17:49 ` Jan Kiszka
2012-09-01 8:31 ` Avi Kivity
2012-09-01 8:57 ` Jan Kiszka
2012-09-01 9:30 ` Avi Kivity
2012-08-30 5:54 ` liu ping fan
2012-08-30 7:08 ` Jan Kiszka
2012-08-30 7:47 ` liu ping fan
2012-09-01 8:46 ` Avi Kivity
2012-09-03 7:44 ` liu ping fan
2012-09-03 8:52 ` Avi Kivity
2012-09-03 10:06 ` liu ping fan
2012-09-03 10:16 ` Avi Kivity
2012-09-04 2:33 ` liu ping fan
2012-09-04 2:34 ` liu ping fan
2012-09-05 8:19 ` liu ping fan
2012-09-05 9:52 ` Avi Kivity
2012-09-05 10:36 ` Jan Kiszka
2012-09-05 10:53 ` Avi Kivity
2012-09-05 11:11 ` Jan Kiszka
2012-09-05 11:25 ` Avi Kivity
2012-09-05 12:02 ` Jan Kiszka
2012-09-05 12:17 ` Avi Kivity
2012-08-27 13:19 ` Anthony Liguori
2012-08-27 15:02 ` Jan Kiszka
2012-08-27 15:14 ` Anthony Liguori
2012-08-27 15:26 ` Jan Kiszka
2012-08-27 16:24 ` Anthony Liguori
2012-08-27 16:59 ` Jan Kiszka
2012-08-27 18:35 ` Avi Kivity
2012-08-27 19:17 ` Anthony Liguori
2012-08-27 19:22 ` Jan Kiszka
2012-08-27 20:58 ` Avi Kivity
2012-08-27 21:34 ` Paolo Bonzini [this message]
2012-08-27 18:27 ` Avi Kivity
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