From c2db292438c20c3f13db6e5563e0ce5b449bedac Mon Sep 17 00:00:00 2001 From: Holger Eitzenberger Date: Sat, 4 Feb 2006 02:13:14 -0800 Subject: [NETFILTER]: ULOG/nfnetlink_log: Use better default value for 'nlbufsiz' Performance tests showed that ULOG may fail on heavy loaded systems because of failed order-N allocations (N >= 1). The default value of 4096 is not optimal in the sense that it actually allocates _two_ contigous physical pages. Reasoning: ULOG uses alloc_skb(), which adds another ~300 bytes for skb_shared_info. This patch sets the default value to NLMSG_GOODSIZE and adds some documentation at the top. Signed-off-by: Holger Eitzenberger Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- net/bridge/netfilter/ebt_ulog.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/bridge') diff --git a/net/bridge/netfilter/ebt_ulog.c b/net/bridge/netfilter/ebt_ulog.c index ce617b3dbbb8..dbbf9f673b55 100644 --- a/net/bridge/netfilter/ebt_ulog.c +++ b/net/bridge/netfilter/ebt_ulog.c @@ -46,7 +46,7 @@ #define PRINTR(format, args...) do { if (net_ratelimit()) \ printk(format , ## args); } while (0) -static unsigned int nlbufsiz = 4096; +static unsigned int nlbufsiz = NLMSG_GOODSIZE; module_param(nlbufsiz, uint, 0600); MODULE_PARM_DESC(nlbufsiz, "netlink buffer size (number of bytes) " "(defaults to 4096)"); -- cgit v1.2.3