Davide Libenzi wrote: > On Thu, 18 Jun 2009, Gregory Haskins wrote: > > >> Davide Libenzi wrote: >> >>> On Thu, 18 Jun 2009, Gregory Haskins wrote: >>> >>> >>> >>>> Actually there is only one (the tx-thread) aside from the eventfd >>>> imposed workqueue one. Incidentally, I would love to get rid of the >>>> other thread too, so I am not just picking on eventfd ;). The other is >>>> a lot harder since it has to update the virtio-ring and may need to page >>>> in guest memory to do so. >>>> >>>> >>> No, there is the interface rx softirq too, that makes two. >>> >> Actually, I believe you are mistaken. It normally executes the softirq >> in interrupt context, not a thread. >> >> But I digress. Lets just shelve the SRCU conversation for another day. >> It was my bad for introducing it now prematurely to solve a mostly >> unrelated problem: the module-reference thing. I didn't realize the >> SRCU change would be so controversial, and I didn't think to split >> things apart as I have done today. >> >> But the fact is: I do not see any way to actually use your referenceless >> POLLHUP release code in a race free way without doing something like I >> propose in 3/4, 4/4. Lets keep the discussion focused on that for now, >> if we could. >> > > OK, since I got literally swamped by the amount of talks and patches over > this theoretically simple topic, would you mind 1) posting the global > patch over eventfd 2) describe exactly what races are you talking about > 3) explain why this should be any concern of eventfd at all? > > > Yes, I can do that. Thanks Davide, -Greg
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