[Bug 74100] [SNB Bisected]igt/gem_reset_stats/close-pending-fork-render causes system hang

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=74100

--- Comment #13 from lu hua <huax.lu at intel.com> ---
Created attachment 95913
  --> https://bugs.freedesktop.org/attachment.cgi?id=95913&action=edit
dmesg

(In reply to comment #12)
> Created attachment 95822 [details] [review]
> fix up semaphore hangcheck code
> 
> Now also a real patch. Please test both this patch and the earlier quick
> hack, thanks.

Test this patch, It still occurs.

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