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17 lines
467 B
Diff
17 lines
467 B
Diff
--- glibc-2.27/nptl/pthread_mutex_lock.c~ 2018-02-01 16:17:18.000000000 +0000
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+++ glibc-2.27/nptl/pthread_mutex_lock.c 2018-05-15 14:19:00.864190585 +0000
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@@ -133,7 +133,13 @@
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LLL_MUTEX_LOCK (mutex);
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break;
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}
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- atomic_spin_nop ();
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+ /* MO read while spinning */
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+ do
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+ {
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+ atomic_spin_nop ();
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+ }
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+ while (atomic_load_relaxed (&mutex->__data.__lock) != 0 &&
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+ ++cnt < max_cnt);
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}
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while (LLL_MUTEX_TRYLOCK (mutex) != 0);
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