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-rw-r--r--erts/emulator/beam/erl_process.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/erts/emulator/beam/erl_process.c b/erts/emulator/beam/erl_process.c
index 2789691c55..bf08bc7a86 100644
--- a/erts/emulator/beam/erl_process.c
+++ b/erts/emulator/beam/erl_process.c
@@ -2095,7 +2095,11 @@ erts_init_scheduling(int mrq, int no_schedulers, int no_schedulers_online)
rq->ix = ix;
erts_smp_atomic_init(&rq->info_flags, ERTS_RUNQ_IFLG_NONEMPTY);
- erts_smp_mtx_init(&rq->mtx, "run_queue");
+ /* make sure that the "extra" id correponds to the schedulers
+ * id if the esdp->no <-> ix+1 mapping change.
+ */
+
+ erts_smp_mtx_init_x(&rq->mtx, "run_queue", make_small(ix + 1));
erts_smp_cnd_init(&rq->cnd);
erts_smp_atomic_init(&rq->spin_waiter, 0);