Re: [Xen-devel] xen/evtchn and forced threaded irq

[Oleksandr Andrushchenko]

On 2/22/19 3:33 PM, Julien Grall wrote:
> Hi,
>
> On 22/02/2019 12:38, Oleksandr Andrushchenko wrote:
> > On 2/20/19 10:46 PM, Julien Grall wrote:
> > > Discussing with my team, a solution that came up would be to 
> > > introduce one atomic field per event to record the number of event 
> > > received. I will explore that solution tomorrow.
> > How will this help if events have some payload?
>
> What payload? The event channel does not carry any payload. It only 
> notify you that something happen. Then this is up to the user to 
> decide what to you with it.
Sorry, I was probably not precise enough. I mean that an event might have
associated payload in the ring buffer, for example [1]. So, counting events
may help somehow, but the ring's data may still be lost
> Cheers,
[1] 
https://xenbits.xen.org/gitweb/?p=xen.git;a=blob;f=xen/include/public/io/displif.h;h=cc5de9cb1f35dedc99c866d73d086b19e496852a;hb=HEAD#l756