On Fri, Aug 22, 2014 at 12:01:11PM -0400, Benjamin LaHaise wrote: > On Tue, Aug 19, 2014 at 08:46:51PM -0400, Benjamin LaHaise wrote: > > You can trigger the behaviour with fio by using userspace event reaping. > > Adding a test case for that behaviour to libaio would be a good idea. > > > I thought about how to fix this, and it isn't actually that hard. Move > > the put_reqs_available() call back into event consumption, and then add > > code in the submit path to call put_reqs_available() if the system runs > > out of events by noticing that there is free space in the event ring. > > Something along the lines below should do it (please note, this is > > completely untested!). I'll test and polish this off tomorrow, as it's > > getting a bit late here. > > Dan, does this patch work for you? It seems to pass your test program > when I run it in a vm... Sorry, I was waiting for a new patch from your direction, I should have replied earlier. What bothered me about the patch you sent is that completed_events is added as a new field but nothing assigns to it, so I wonder how it can be effective. -- Dan Aloni -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html