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Date: Thu, 25 Jan 2007 23:14:49 +0100 (MET) From: Jan Engelhardt <jengelh@...ux01.gwdg.de> To: David Miller <davem@...emloft.net> cc: kadlec@...ckhole.kfki.hu, netdev@...r.kernel.org, netfilter-devel@...ts.netfilter.org Subject: Re: owner-Match in 2.6.20-rc5 (fwd) >> >> The report below was posted on the netfilter user list. Isn't there any >> >> ill side effect by reverting the change? >> > >> >Performance regression :-( >> > >> >This optimization saves a whole handful of heavy atomic operations in >> >the packet transmit path of TCP. >> > >> >As I understand it, the owner-Match is not in the upstream tree, and >> >it's the only thing that cares, so I see no reason to cater for it. >> >> For me, it's there. >> -rw-r--r-- 1 jengelh users 2247 Jan 25 21:37 >> /erk/kernel/linux-2.6.20-rc6/net/ipv4/netfilter/ipt_owner.c > >Ok, I'll see what I can do about this :-) > People really depend on this. Much more than than pid/comm/smpunsafe stuff. For example, a web server [cgi enabled, etc.] which also runs squid, to force all webtraffic through it: -A OUTPUT -p tcp --dport 80 -m owner ! --uid-owner squid -j REDIRECT --to-ports 3128 -`J' -- - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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