On Tue, Dec 20, 2011 at 09:30:55PM +0200, Michael S. Tsirkin wrote:

Hmm, in that case it looks like a nasty race could get
triggered, with try_fill_recv run on multiple CPUs in parallel,
corrupting the linked list within the vq.

Using the mutex as my patch did will fix that naturally, as well.

Don't know the code but just use nrt wq.  There's even a system one
called system_nrq_wq.

Thanks.

-- 
tejun