# \[PATCH net-next v2 2/3\] pool\_pool: avoid calling compound\_head() for skb frag page

- From: Yunsheng Lin \<hidden\>
- Date: 2021-09-14 12:12:49 
- List: netdev
- Page: https://ratatoskr.run/netdev/2021/09/1507808
- Thread: https://ratatoskr.run/netdev/2021/09/1507806/t.md

```text
As the page for a skb frag is always a head page, so make
sure skb_pp_recycle() passes a head page to avoid calling
compound_head() for skb frag page case.

Signed-off-by: Yunsheng Lin <redacted>
---
 include/linux/skbuff.h | 2 +-
 net/core/page_pool.c   | 2 --
 2 files changed, 1 insertion(+), 3 deletions(-)

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 6bdb0db3e825..35eebc2310a5 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -4722,7 +4722,7 @@ static inline bool skb_pp_recycle(struct sk_buff *skb, void *data)
 {
 	if (!IS_ENABLED(CONFIG_PAGE_POOL) || !skb->pp_recycle)
 		return false;
-	return page_pool_return_skb_page(virt_to_page(data));
+	return page_pool_return_skb_page(virt_to_head_page(data));
 }
 
 #endif	/* __KERNEL__ */
diff --git a/net/core/page_pool.c b/net/core/page_pool.c
index ba9f14deacf4..09d7b8614ef5 100644
--- a/net/core/page_pool.c
+++ b/net/core/page_pool.c
@@ -740,8 +740,6 @@ bool page_pool_return_skb_page(struct page *page)
 {
 	struct page_pool *pp;
 
-	page = compound_head(page);
-
 	/* page->pp_magic is OR'ed with PP_SIGNATURE after the allocation
 	 * in order to preserve any existing bits, such as bit 0 for the
 	 * head page of compound page and bit 1 for pfmemalloc page, so
-- 
2.33.0

```