netdev - [PATCH] net: fix the per task frag allocator size

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 for Android: free password hash cracker in your pocket

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

Date:   Fri, 23 Nov 2018 10:03:26 +0800
From:   Li RongQing <lirongqing@...du.com>
To:     netdev@...r.kernel.org, edumazet@...gle.com
Subject: [PATCH] net: fix the per task frag allocator size

when fill task frag, 32K pages, 128MB memory is asked, it
hardly successes when system has memory stress

and commit '5640f7685831 ("net: use a per task frag allocator")'
said it wants 32768 bytes, not 32768 pages:

	 "(up to 32768 bytes per frag, thats order-3 pages on x86)"

Fixes: 5640f7685831e ("net: use a per task frag allocator")
Signed-off-by: Zhang Yu <zhangyu31@...du.com>
Signed-off-by: Li RongQing <lirongqing@...du.com>
---
 net/core/sock.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/core/sock.c b/net/core/sock.c
index 6d7e189e3cd9..e3cbefeedf5c 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -2186,8 +2186,8 @@ static void sk_leave_memory_pressure(struct sock *sk)
 	}
 }
 
-/* On 32bit arches, an skb frag is limited to 2^15 */
-#define SKB_FRAG_PAGE_ORDER	get_order(32768)
+/* On 32bit arches, an skb frag is limited to 2^15 bytes*/
+#define SKB_FRAG_PAGE_ORDER	get_order(8)
 
 /**
  * skb_page_frag_refill - check that a page_frag contains enough room
-- 
2.16.2