From: Song Liu <song@kernel.org>
Date: Fri, 15 Apr 2022 16:44:11 +0000 (-0700)
Subject: page_alloc: use vmalloc_huge for large system hash
X-Git-Tag: v5.18-rc4~6
X-Git-Url: https://repo.jachan.dev/linux.git/commitdiff_plain/f2edd118d02d

page_alloc: use vmalloc_huge for large system hash

Use vmalloc_huge() in alloc_large_system_hash() so that large system
hash (>= PMD_SIZE) could benefit from huge pages.

Note that vmalloc_huge only allocates huge pages for systems with
HAVE_ARCH_HUGE_VMALLOC.

Signed-off-by: Song Liu <song@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Rik van Riel <riel@surriel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 33ca8cab21e6..0e42038382c1 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -8919,7 +8919,7 @@ void *__init alloc_large_system_hash(const char *tablename,
 				table = memblock_alloc_raw(size,
 							   SMP_CACHE_BYTES);
 		} else if (get_order(size) >= MAX_ORDER || hashdist) {
-			table = __vmalloc(size, gfp_flags);
+			table = vmalloc_huge(size, gfp_flags);
 			virt = true;
 			if (table)
 				huge = is_vm_area_hugepages(table);