From: Holger Eitzenberger <heitzenberger@astaro.com>
Date: Sat, 4 Feb 2006 10:13:14 +0000 (-0800)
Subject: [NETFILTER]: ULOG/nfnetlink_log: Use better default value for 'nlbufsiz'
X-Git-Tag: v2.6.16-rc3~146^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c2db292438c20c3f13db6e5563e0ce5b449bedac;p=pandora-kernel.git

[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>
---

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