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authorHolger Eitzenberger <heitzenberger@astaro.com>2006-02-04 02:13:14 -0800
committerDavid S. Miller <davem@sunset.davemloft.net>2006-02-04 23:51:18 -0800
commitc2db292438c20c3f13db6e5563e0ce5b449bedac (patch)
tree775c7aa2e2e6069cb238833e5328a7b42b23041a /net/bridge/netfilter/ebt_ulog.c
parentddc8d029ac6813827849801bce2d8c8813070db6 (diff)
[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 <heitzenberger@astaro.com> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/bridge/netfilter/ebt_ulog.c')
-rw-r--r--net/bridge/netfilter/ebt_ulog.c2
1 files changed, 1 insertions, 1 deletions
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)");

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