linux-kernel - [PATCH net-next v19 08/14] mm: page_frag: use __alloc_pages() to replace alloc_pages

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Message-Id: <20241001075858.48936-9-linyunsheng@huawei.com>
Date: Tue,  1 Oct 2024 15:58:51 +0800
From: Yunsheng Lin <yunshenglin0825@...il.com>
To: davem@...emloft.net,
	kuba@...nel.org,
	pabeni@...hat.com
Cc: netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Yunsheng Lin <linyunsheng@...wei.com>,
	Alexander Duyck <alexander.duyck@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-mm@...ck.org
Subject: [PATCH net-next v19 08/14] mm: page_frag: use __alloc_pages() to replace alloc_pages_node()

It seems there is about 24Bytes binary size increase for
__page_frag_cache_refill() after refactoring in arm64 system
with 64K PAGE_SIZE. By doing the gdb disassembling, It seems
we can have more than 100Bytes decrease for the binary size
by using __alloc_pages() to replace alloc_pages_node(), as
there seems to be some unnecessary checking for nid being
NUMA_NO_NODE, especially when page_frag is part of the mm
system.

CC: Alexander Duyck <alexander.duyck@...il.com>
Signed-off-by: Yunsheng Lin <linyunsheng@...wei.com>
---
 mm/page_frag_cache.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/mm/page_frag_cache.c b/mm/page_frag_cache.c
index 6f6e47bbdc8d..a5448b44068a 100644
--- a/mm/page_frag_cache.c
+++ b/mm/page_frag_cache.c
@@ -61,11 +61,11 @@ static struct page *__page_frag_cache_refill(struct page_frag_cache *nc,
 #if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE)
 	gfp_mask = (gfp_mask & ~__GFP_DIRECT_RECLAIM) |  __GFP_COMP |
 		   __GFP_NOWARN | __GFP_NORETRY | __GFP_NOMEMALLOC;
-	page = alloc_pages_node(NUMA_NO_NODE, gfp_mask,
-				PAGE_FRAG_CACHE_MAX_ORDER);
+	page = __alloc_pages(gfp_mask, PAGE_FRAG_CACHE_MAX_ORDER,
+			     numa_mem_id(), NULL);
 #endif
 	if (unlikely(!page)) {
-		page = alloc_pages_node(NUMA_NO_NODE, gfp, 0);
+		page = __alloc_pages(gfp, 0, numa_mem_id(), NULL);
 		order = 0;
 	}
 
-- 
2.34.1