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Re: [Xen-devel] [PATCH] [HVM] Prevent usb driver crashes in Windows

To: Steve Ofsthun <sofsthun@xxxxxxxxxxxxxxx>
From: Keir Fraser <keir@xxxxxxxxxxxxx>
Date: Wed, 06 Jun 2007 19:22:45 +0100
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, Ben Guthro <bguthro@xxxxxxxxxxxxxxx>
Delivery-date: Wed, 06 Jun 2007 11:20:53 -0700
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
Thread-index: AceoZ62K7Dn2mBRaEdyEZAAX8io7RQ==
Thread-topic: [Xen-devel] [PATCH] [HVM] Prevent usb driver crashes in Windows

On 6/6/07 18:03, "Steve Ofsthun" <sofsthun@xxxxxxxxxxxxxxx> wrote:

>> What precisely is the race? Qemu-dm is single threaded. Memcpy() probably
>> ends up doing int copies anyway if things are appropriately aligned
>> (although we might not want to rely on that).
> 
> The race is between a domU guest cpu running guest driver code and a dom0
> cpu running the timer based USB emulation code in QEMU.

I see. Thanks!

 -- Keir


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References:
- Re: [Xen-devel] [PATCH] [HVM] Prevent usb driver crashes in Windows
  - From: Steve Ofsthun

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