netdev - [PATCH] net: use non-compound pages in frag allocator

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Message-Id: <1470314858-32105-1-git-send-email-ilyal@mellanox.com>
Date:	Thu,  4 Aug 2016 15:47:38 +0300
From:	Ilya Lesokhin <ilyal@...lanox.com>
To:	netdev@...r.kernel.org, edumazet@...gle.com
Cc:	Ilya Lesokhin <ilyal@...lanox.com>
Subject: [PATCH] net: use non-compound pages in frag allocator

The code currently always references the first page in the
frag therefore there is no need to pay the extra overhead
of making the frag page compound

Signed-off-by: Ilya Lesokhin <ilyal@...lanox.com>
---
 net/core/sock.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/sock.c b/net/core/sock.c
index 08bf97e..77432ba 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1993,7 +1993,7 @@ bool skb_page_frag_refill(unsigned int sz, struct page_frag *pfrag, gfp_t gfp)
 	if (SKB_FRAG_PAGE_ORDER) {
 		/* Avoid direct reclaim but allow kswapd to wake */
 		pfrag->page = alloc_pages((gfp & ~__GFP_DIRECT_RECLAIM) |
-					  __GFP_COMP | __GFP_NOWARN |
+					  __GFP_NOWARN |
 					  __GFP_NORETRY,
 					  SKB_FRAG_PAGE_ORDER);
 		if (likely(pfrag->page)) {
-- 
1.8.3.1