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| author | Sverker Eriksson <sverker@erlang.org> | 2017-06-29 23:30:23 +0200 |
|---|---|---|
| committer | Sverker Eriksson <sverker@erlang.org> | 2017-06-30 15:01:08 +0200 |
| commit | dbbf643c632a175a28ea39ba780947ff13eca039 (patch) | |
| tree | d5772d7603404b967482350ce8de0b8e4db30407 | |
| parent | 5e1b5ef47f3f2b898d30e0425823835bd9a574d4 (diff) | |
| download | erlang-dbbf643c632a175a28ea39ba780947ff13eca039.tar.gz | |
erts: Fix bug in quick alloc
The effect of the race is that a pre-allocated memory block
is inserted last without updating tail.data.last, which will cause
all subsequent insertions to also fail to update tail.data.last.
Hence all pre-allocation for this quick alloc instance is leaked
for this thread and will fallback on erts_alloc.
| -rw-r--r-- | erts/emulator/beam/erl_sched_spec_pre_alloc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/erts/emulator/beam/erl_sched_spec_pre_alloc.c b/erts/emulator/beam/erl_sched_spec_pre_alloc.c index caec24bc03..ca2d834381 100644 --- a/erts/emulator/beam/erl_sched_spec_pre_alloc.c +++ b/erts/emulator/beam/erl_sched_spec_pre_alloc.c @@ -161,7 +161,7 @@ enqueue_remote_managed_thread(erts_sspa_chunk_header_t *chdr, if ((i & 1) == 0) itmp = itmp2; else { - enq = (erts_sspa_blk_t *) itmp; + enq = (erts_sspa_blk_t *) itmp2; itmp = erts_atomic_read_acqb(&enq->next_atmc); ASSERT(itmp != ERTS_AINT_NULL); } |