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[PATCH] malloc: avoid main_arena

In spite of using MAP_HUGETLB we still had memory allocated in small
pages.  One cause is the main_arena, which uses sbrk() to allocate
memory.  By removing it from the per-numa lists we should minimize use
of the main_arena, while keeping it around for special-purpose
allocations around fork time, etc.

JIRA: PURE-27597
 tpc/malloc2.13/arena.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tpc/malloc2.13/arena.h b/tpc/malloc2.13/arena.h
index d66b4e7029a2..0ee6286bf286 100644
--- a/tpc/malloc2.13/arena.h
+++ b/tpc/malloc2.13/arena.h
@@ -354,9 +354,9 @@ static void ptmalloc_init(void)
 #endif				/* !defined NO_THREADS */
 	mutex_init(&main_arena.mutex); = &main_arena;
-	numa_arena[0] = &main_arena;
+	main_arena.numa_node = -1;
-	for (i = 1; i <= max_node; i++) {
+	for (i = 0; i <= max_node; i++) {
 		numa_arena[i] = _int_new_arena(0, i);
 		numa_arena[i]->local_next = numa_arena[i];

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