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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

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