diff mbox series

[net-next,v6,03/15] mm: page_frag: use free_unref_page() to free page fragment

Message ID 20240605133306.11272-4-linyunsheng@huawei.com (mailing list archive)
State New
Headers show
Series [net-next,v6,01/15] mm: page_frag: add a test module for page_frag | expand

Commit Message

Yunsheng Lin June 5, 2024, 1:32 p.m. UTC 
free_the_page() used by page_frag call free_unref_page() or
__free_pages_ok() depending on pcp_allowed_order(), as the
max order of page allocated for page_frag is 3, the checking
in pcp_allowed_order() is unnecessary.

So call free_unref_page() directly to free a page_frag page
to aovid the unnecessary checking.

As the free_the_page() is a static function in page_alloc.c,
using the new one also allow moving page_frag related code
to a new file in the next patch.

CC: Alexander Duyck <alexander.duyck@gmail.com>
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
---
 mm/page_alloc.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 2e22ce5675ca..0511c30bc265 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4781,6 +4781,9 @@  static struct page *__page_frag_cache_refill(struct page_frag_cache *nc,
 	gfp_t gfp = gfp_mask;
 
 #if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE)
+	/* Ensure free_unref_page() can be used to free the page fragment */
+	BUILD_BUG_ON(PAGE_FRAG_CACHE_MAX_ORDER > PAGE_ALLOC_COSTLY_ORDER);
+
 	gfp_mask = (gfp_mask & ~__GFP_DIRECT_RECLAIM) |  __GFP_COMP |
 		   __GFP_NOWARN | __GFP_NORETRY | __GFP_NOMEMALLOC;
 	page = alloc_pages_node(NUMA_NO_NODE, gfp_mask,