[Bug 54979] Futexes which protect memory allocation congest, causing 100x performance degradation

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=54979

--- Comment #11 from Zeb Figura  ---
(In reply to John Nagle from comment #10)
> Maybe if the middle spinlock had a quick quit to a hard block...

Sorry, what do you mean by "the middle spinlock"? I guess you probably mean
futex_queue.lock, since it's the only spinlock.

We can't block there, because we have no fast way to wake up a waiter. [And
frankly, even if we could block, I worry about the performance implications.]