[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [PATCH for-2.10 0/3] qdev/vfio: defer DEVICE_DEL to avo
|
From: |
Peter Maydell |
|
Subject: |
Re: [Qemu-devel] [PATCH for-2.10 0/3] qdev/vfio: defer DEVICE_DEL to avoid races with libvirt |
|
Date: |
Thu, 27 Jul 2017 10:11:48 +0100 |
On 27 July 2017 at 02:30, Michael Roth <address@hidden> wrote:
> In particular, Mellanox CX4 adapters on PowerNV hosts might not be fully
> quiesced by vfio-pci's finalize() routine until up to 6s after the
> DEVICE_DELETED was emitted, leading to detach-device on the libvirt side
> pretty
> much always crashing the host.
My initial naive thought is that if the host kernel can crash then
this is a host kernel bug... shouldn't the host kernel refuse
the subsequent libvirt rebind if it would cause a crash ?
thanks
-- PMM