[Mesa-dev] [Bug 94040] clGetPlatformIDs causes futex race condition

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94040

--- Comment #8 from Francisco Jerez <currojerez at riseup.net> ---
(In reply to bob from comment #7)
> In the specific case of blender, there are 31 hung up threads with around 9
> each waiting on
> 
> __lll_lock_wait () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
> pthread_cond_wait@@GLIBC_2.3.2 () at
> ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
> do_futex_wait () at ../sysdeps/unix/sysv/linux/futex-internal.h:205
> 
> The remaining threads are waiting on poll () at
> ../sysdeps/unix/syscall-template.S:84 with the last being the one I provided
> a backtrace for. Is there any one you're interested in particular? After
> sampling some of the backtraces they seem to be unrelated, either
> blender-specific or just mainloops for udev and pulseaudio waiting for
> events, but if please let me know if there's any backtraces you'd like

Is there any other hung thread showing mesa function calls in the stack trace? 
That would be particularly interesting.  In any case the more backtraces you
can provide the better :)

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