Re: [Xen-devel] [PATCH V4 3/4] Introduce XEN scsiback module

[Juergen Gross <jgross@xxxxxxxx>]

On 08/12/2014 02:29 PM, Juergen Gross wrote:
> On 08/11/2014 08:14 PM, Christoph Hellwig wrote:
> > > +static void scsiback_notify_work(struct vscsibk_info *info)
> > > +{
> > > +    info->waiting_reqs = 1;
> > > +    wake_up(&info->wq);
> > > +}
> > > +
> > > +static irqreturn_t scsiback_intr(int irq, void *dev_id)
> > > +{
> > > +    scsiback_notify_work((struct vscsibk_info *)dev_id);
> > > +    return IRQ_HANDLED;
> > > +}
> > Seems like this driver should get the same threaded irq treatment as
> > the initiator side?
> Indeed.
Turns out to be hard. The interrupt is allocated via
bind_interdomain_evtchn_to_irqhandler() which is not capable of threaded
irq handling. The underlying bind_interdomain_evtchn_to_irq() is not
exported, so I can't use it.

I'll try to change this, but until then I have to leave the irq handling
more or less the same.


Juergen

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