On Sun, Mar 25, 2012 at 1:29 PM, Steve Glass <stevie.glass@xxxxxxxxx> wrote: > On 22 March 2012 19:52, Stefan Hajnoczi <stefanha@xxxxxxxxx> wrote: >> >> >> Can you queue a tx->rx kick on the vhost work queue with >> vhost_work_queue()? >> >> Stefan > > > I've been looking at this and trying to work out how to achieve that. I can > see how I can enqueue some work on the vhost queue but the rx_handler needs > to run in the process context of the receiving VM (or else it can't access > the ring). I don't think that's true of the work queue (doesn't it run with > the qemu process context?) The vhost worker thread has the mm of the process, see use_mm(dev->mm) in drivers/vhost/vhost.c:vhost_worker(). It sounds like you need vhost worker A (tx) to schedule work for vhost worker B (rx). Stefan -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
