From: Gerd Hoffmann <kraxel@redhat.com>
To: Anthony Liguori <anthony@codemonkey.ws>
Cc: Peter Maydell <peter.maydell@linaro.org>,
Anthony Liguori <aliguori@us.ibm.com>,
Jan Kiszka <jan.kiszka@siemens.com>,
qemu-devel@nongnu.org, Markus Armbruster <armbru@redhat.com>,
Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: [Qemu-devel] [PATCH 04/14] qdev: take ownership of id pointer
Date: Tue, 20 Sep 2011 08:36:14 +0200 [thread overview]
Message-ID: <4E78345E.5080300@redhat.com> (raw)
In-Reply-To: <4E776D6D.2040702@codemonkey.ws>
On 09/19/11 18:27, Anthony Liguori wrote:
> On 09/19/2011 02:34 AM, Gerd Hoffmann wrote:
>> FYI: Keeping the pointer to the QemuOpts has one more reason: It will
>> free the
>> QemuOpts on hot-unplug, which is needed to free the id from QemuOpts
>> point of
>> view, which in turn allows to re-use the id when hot-plugging the same
>> (or
>> another) device later on.
>
> You mean, tie QemuOpts life cycle to devices life cycle
Yes.
> such that you
> cannot accidentally create a non-device QemuOpts that conflicts with the
> id of a device?
Device QemuOpts have their own id namespace, so this is just about
conflicts within devices. This ...
device_add e1000,id=nic1
device_del nic1
device_add e1000,id=nic1
... will work only if you free the QemuOpts when deleting a device,
otherwise QemuOpts will complain that nic1 is used already.
cheers,
Gerd
next prev parent reply other threads:[~2011-09-20 6:36 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-16 16:00 [Qemu-devel] [PATCH 00/14] qdev: assign unique names to all devices (part 1) Anthony Liguori
2011-09-16 16:00 ` [Qemu-devel] [PATCH 01/14] apic: rename apic.id -> apic.index Anthony Liguori
2011-09-16 16:00 ` [Qemu-devel] [PATCH 02/14] qdev: enforce that no devices overload the id property Anthony Liguori
2011-09-16 16:00 ` [Qemu-devel] [PATCH 03/14] qdev: push id into qdev_create calls Anthony Liguori
2011-09-16 16:00 ` [Qemu-devel] [PATCH 04/14] qdev: take ownership of id pointer Anthony Liguori
2011-09-19 7:34 ` Gerd Hoffmann
2011-09-19 16:27 ` Anthony Liguori
2011-09-20 6:36 ` Gerd Hoffmann [this message]
2011-09-20 13:04 ` Anthony Liguori
2011-09-20 13:21 ` Gerd Hoffmann
2011-09-20 13:55 ` Anthony Liguori
2011-09-20 14:11 ` Gerd Hoffmann
2011-09-16 16:00 ` [Qemu-devel] [PATCH 05/14] qdev: remove opts pointer tracking Anthony Liguori
2011-09-19 7:35 ` Gerd Hoffmann
2011-09-16 16:00 ` [Qemu-devel] [PATCH 06/14] qdev: add ability to do QOM-style derived naming Anthony Liguori
2011-09-17 18:39 ` Blue Swirl
2011-09-16 16:00 ` [Qemu-devel] [PATCH 07/14] sysbus: add an id argument to sysbus_create_simple() Anthony Liguori
2011-09-16 16:00 ` [Qemu-devel] [PATCH 08/14] sysbus: make create_varargs take an id Anthony Liguori
2011-09-16 16:00 ` [Qemu-devel] [PATCH 09/14] fw_cfg: add name to global fw_cfg device Anthony Liguori
2011-09-16 16:00 ` [Qemu-devel] [PATCH 10/14] isa: add name parameter to device creation Anthony Liguori
2011-09-16 16:00 ` [Qemu-devel] [PATCH 11/14] pci: obtain devfn before initializing the device Anthony Liguori
2011-09-16 16:00 ` [Qemu-devel] [PATCH 12/14] pci: give pci devices a default name Anthony Liguori
2011-09-16 16:00 ` [Qemu-devel] [PATCH 13/14] ide: give IDE drives a default name in qdev Anthony Liguori
2011-09-16 16:00 ` [Qemu-devel] [PATCH 14/14] pc: assign names to machine created devices Anthony Liguori
2011-09-16 16:22 ` [Qemu-devel] [PATCH 00/14] qdev: assign unique names to all devices (part 1) Anthony Liguori
2011-09-16 16:48 ` Jan Kiszka
2011-09-16 16:54 ` Anthony Liguori
2011-09-16 17:03 ` Jan Kiszka
2011-09-16 18:06 ` Anthony Liguori
2011-09-16 17:11 ` Kevin Wolf
2011-09-16 18:03 ` Anthony Liguori
2011-09-19 7:26 ` Jan Kiszka
2011-09-19 14:05 ` Anthony Liguori
2011-09-19 14:24 ` Kevin Wolf
2011-09-20 8:32 ` Jan Kiszka
2011-09-19 7:41 ` Kevin Wolf
2011-09-16 18:21 ` Anthony Liguori
2011-09-19 7:34 ` Jan Kiszka
2011-09-17 18:41 ` Blue Swirl
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