On May 18, 2010, at 9:33 PM, Nick Mathewson wrote: > On Thu, Apr 29, 2010 at 2:14 PM, Sebastian Sjöberg > <sebastian.sjob...@axis.com> wrote: > [...] >>> If it's the second problem, I'd start by testing whether stuff begins >>> to work when you set the EVENT_NOEPOLL environment variable. If so, >>> then the bug is probably with the epoll backend -- or at least, it >>> requires the epoll backend to appear. To debug this, I'd add >>> debugging messages to the loop in epoll_dispatch that calls >>> evmap_io_active to tell me whenever it decided not to call >>> evmap_io_active, and I'd have evmap_io_active tell me whenever it made >>> 0 events become active. >> >> Cheers, I haven't yet been able to reproduce it when disabling epoll. >> >> I've started to debug the evmap_io_active calls and after a while there are >> a no events being activated as you said so I guess at some point the there's >> a mismatch between what's in epoll and in the event map. > > Hi, Sebastian! Have you had any luck tracking this down? I'd really > like to try to get this bug fixed before 2.0 goes into a release > candidate status.
Hi Nick, No luck so far, I had to stop looking for the issue. > > I've looked through the code, and tried to reproduce the behavior > you're seeing, but I haven't been able to figure out where the trouble > is. I'm attaching a patch that should give a warning assertion > failure when the error condition hits; together with debugging log > output [build libevent with -DDEBUG to get that ], it might be enough > to track the bug down. I will try the patch later today and let you know. > > Also, is there some code I can run to try to reproduce this bug > myself? I've tried writing examples with openssl, but I can't make > the warnings trigger. I tried to create a minimal example but couldn't reproduce the issue but I try again. Best regards, Sebastian Sjoberg > > yrs, > -- > Nick > <0001-Warning-statements-to-catch-possible-bug-in-epoll.patch> *********************************************************************** To unsubscribe, send an e-mail to majord...@freehaven.net with unsubscribe libevent-users in the body.
