1 commit 75795017480da0f0a1157e945043249fe625f92f
2 Author: Willy Tarreau <w@1wt.eu>
3 Date: Tue Oct 16 16:11:56 2018 +0200
5 BUG/MEDIUM: threads: fix thread_release() at the end of the rendez-vous point
7 There is a bug in this function used to release other threads. It leaves
8 the current thread marked as harmless. If after this another thread does
9 a thread_isolate(), but before the first one reaches poll(), the second
10 thread will believe it's alone while it's not.
12 This must be backported to 1.8 since the rendez-vous point was merged
15 (cherry picked from commit a9c0252b2e8ff7bb728b84d977ac6e9581ea12f8)
16 Signed-off-by: Willy Tarreau <w@1wt.eu>
18 diff --git a/src/hathreads.c b/src/hathreads.c
19 index 9dba4356..0a7c12f7 100644
22 @@ -221,12 +221,8 @@ void thread_isolate()
27 - HA_ATOMIC_AND(&threads_want_rdv_mask, ~tid_bit);
28 - if (!(threads_want_rdv_mask & all_threads_mask))
30 - thread_harmless_till_end();
32 + HA_ATOMIC_AND(&threads_want_rdv_mask, ~tid_bit);
33 + thread_harmless_end();
36 __attribute__((constructor))