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

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98172

--- Comment #49 from Suzuki, Shinji <shinji.suzuki at gmail.com> ---
(In reply to Marek Olšák from comment #47)
> What was wrong with the initial mutex idea? I think the solution in comment
> 22 is sufficient to close this bug.
I did not like added storage overhead of containing a mutex and CPU overhead of
initialization and destruction of the mutex even for single threaded execution.
Also I wonder if the lock needed to be held while so->fence is inspected &
duplicated. (Per sync-object mutex poses less contention than using
ctx->Shared.Mutex therefore this point is not worth bothering about.)
However I can't see anything wrong with the fix.

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