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Avoid taking large_mtx for auto arenas.

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On tcache flush path, we can avoid touching the large_mtx for auto arenas, since
it was only needed for manual arenas where arena_reset is allowed.
This commit is contained in:
Qi Wang
2018-05-29 15:55:04 -07:00
committed by Qi Wang
parent 9bd8deb260
commit c834912aa9
2 changed files with 9 additions and 3 deletions
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3
src/large.c
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@@ -329,8 +329,9 @@ large_dalloc_prep_impl(tsdn_t *tsdn, arena_t *arena, extent_t *extent,
large_dalloc_maybe_junk(extent_addr_get(extent),
extent_usize_get(extent));
} else {
malloc_mutex_assert_owner(tsdn, &arena->large_mtx);
/* Only hold the large_mtx if necessary. */
if (!arena_is_auto(arena)) {
malloc_mutex_assert_owner(tsdn, &arena->large_mtx);
extent_list_remove(&arena->large, extent);
}
}