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Subject: [Bug 209233] [patch] pthread_suspend_all_np races with check_suspend
Date: Wed, 04 May 2016 15:19:06 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D209233

--- Comment #3 from Konstantin Belousov <kib@FreeBSD.org> ---
(In reply to Lawrence Esswood from comment #2)
Yes, my intent is to guarantee that the THR_FLAGS_SUSPENDED is never left
dandling, since we are not supposed to distinguish between previous and cur=
rent
suspension in suspend_common().

Then, why not simply clear THR_FLAGS_SUSPENDED in resume_common() ?  We
apparently do not care how much thread moved ahead returning from
check_suspend(), and the function unblocks SIGCANCEL only after it is ready=
 to
next suspend.

Could you provide a test case for the problem ?

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