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Re: [Xen-devel] [PATCH] xen: Avoid calling device suspend/resume callbacks
- To: Ross Lagerwall <ross.lagerwall@xxxxxxxxxx>
- From: Jan Beulich <JBeulich@xxxxxxxx>
- Date: Mon, 29 Jul 2019 15:57:13 +0000
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- Cc: Juergen Gross <JGross@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>
- Delivery-date: Mon, 29 Jul 2019 16:18:55 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Thread-index: AQHVRiQr6DrMZ4ncf0iQGv5Hre+VmqbhwEEA
- Thread-topic: [Xen-devel] [PATCH] xen: Avoid calling device suspend/resume callbacks
On 29.07.2019 17:41, Ross Lagerwall wrote:
> When suspending/resuming or migrating under Xen, there isn't much need
> for suspending and resuming all the attached devices since the Xen/QEMU
> should correctly maintain the hardware state. Drop these calls and
> replace with more specific calls to ensure Xen frontend devices are
> properly reconnected.
Is this true for the general pass-through case as well? While migration
may not be (fully) compatible with pass-through, iirc save/restore is.
Would qemu restore state of physical PCI devices?
Jan
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