From: "Michael S. Tsirkin" <mst@redhat.com>
To: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Alex Williamson <alex.williamson@redhat.com>,
Marcelo Tosatti <mtosatti@redhat.com>,
qemu-devel <qemu-devel@nongnu.org>, Avi Kivity <avi@redhat.com>
Subject: Re: [Qemu-devel] [PATCH 1/2] pci: Add pci_device_get_host_irq
Date: Fri, 1 Jun 2012 19:05:33 +0300 [thread overview]
Message-ID: <20120601160533.GC23768@redhat.com> (raw)
In-Reply-To: <4FC8E5A7.2000001@siemens.com>
On Fri, Jun 01, 2012 at 05:54:15PM +0200, Jan Kiszka wrote:
> On 2012-06-01 17:28, Michael S. Tsirkin wrote:
> >>> So I won't object to adding a new API but if we do
> >>> it properly this won't help compatibility :(
> >>
> >> It will as this API does not touch the parts that affect the vmstate
> >> (ie. semantics of irq_count won't change).
> >
> > Yes but irq_count in vmstate is a bug. IMO even if we do
> > not change anything we should ignore irq_count on
> > load and recalculate it from what the devices supply.
>
> I don't disagree. But this will only allow keeping backward migration
> support if we preserve the semantics of current map_irq somewhere - to
> keep the chance of calculating the legacy values for vmsave as well.
>
> Jan
We don't need to preserve it, right? We can calculate it before
savevm.
> --
> Siemens AG, Corporate Technology, CT T DE IT 1
> Corporate Competence Center Embedded Linux
next prev parent reply other threads:[~2012-06-01 16:05 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <4FC65910.4030908@siemens.com>
[not found] ` <20120530174125.GC32721@redhat.com>
[not found] ` <4FC65E19.6090203@siemens.com>
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[not found] ` <20120530185150.GA1546@redhat.com>
[not found] ` <4FC66FB1.9050306@siemens.com>
[not found] ` <20120530193034.GE1551@redhat.com>
[not found] ` <4FC681B4.3030807@web.de>
[not found] ` <20120530203119.GH1551@redhat.com>
2012-06-01 12:52 ` [Qemu-devel] [PATCH 1/2] pci: Add pci_device_get_host_irq Jan Kiszka
2012-06-01 13:27 ` Michael S. Tsirkin
2012-06-01 13:57 ` Jan Kiszka
2012-06-01 14:34 ` Michael S. Tsirkin
2012-06-01 15:15 ` Jan Kiszka
2012-06-01 15:28 ` Michael S. Tsirkin
2012-06-01 15:54 ` Jan Kiszka
2012-06-01 16:05 ` Michael S. Tsirkin [this message]
2012-06-01 16:17 ` Jan Kiszka
2012-06-01 15:30 ` Michael S. Tsirkin
2012-06-01 15:59 ` Jan Kiszka
2012-06-01 15:26 ` Michael S. Tsirkin
2012-06-01 13:28 ` Michael S. Tsirkin
2012-06-01 13:43 ` Jan Kiszka
2012-05-21 13:13 Jan Kiszka
2012-05-21 14:10 ` Alex Williamson
2012-05-21 14:36 ` Avi Kivity
2012-05-21 14:47 ` Jan Kiszka
2012-05-21 17:34 ` Michael S. Tsirkin
2012-05-21 18:58 ` Jan Kiszka
2012-05-21 21:04 ` Michael S. Tsirkin
2012-05-21 19:05 ` Michael S. Tsirkin
2012-05-21 20:35 ` Jan Kiszka
2012-05-21 21:03 ` Michael S. Tsirkin
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