[Mesa-dev] [Bug 98172] Concurrent call to glClientWaitSync results in segfault in one of the waiters.

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Wed Oct 19 10:51:47 UTC 2016


--- Comment #31 from Suzuki, Shinji <shinji.suzuki at gmail.com> ---
(In reply to Michel Dänzer from comment #30)
> (In reply to Suzuki, Shinji from comment #29)
> Yes, that'll be patch 2, à la
> https://patchwork.freedesktop.org/patch/115220/ . :)
Why is this patch rejected?

Now I'm revisiting your patch. Do we need to have mutual exclusion on
   screen->fence_reference(screen, &fence, so->fence);
      screen->fence_reference(screen, &so->fence, NULL);
Concurrent calls to screen->fence_reference(screen, &so->fence, NULL) must be
arbitrated as they race on dereference/resetting of the lhs value. But I
believe, though not too confident, that reference counting itself is
implemented in thread-safe manner therefore no arbitration on
screen->fence_reference(screen, &fence, so->fence); is needed.

You are receiving this mail because:
You are the assignee for the bug.
You are the QA Contact for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/mesa-dev/attachments/20161019/3c4980ba/attachment-0001.html>

More information about the mesa-dev mailing list