Date: Tue, 10 Jan 2012 14:26:45 -0800 From: Doug Barton <dougb@FreeBSD.org> To: Dennis Koegel <dk@neveragain.de> Cc: freebsd-net@freebsd.org, hrs@FreeBSD.org Subject: Re: Unnecessary sleep in network.subr: ipv6_up() Message-ID: <4F0CBB25.4060902@FreeBSD.org> In-Reply-To: <20120110102405.GA82356@neveragain.de> References: <20120110102405.GA82356@neveragain.de>
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Looping in the author of that change ... On 01/10/2012 02:24, Dennis Koegel wrote: > Cheers, > > problem: Having a *lot* of IPv6 interfaces (Vlan interfaces in this case) > causes a huge and annoying delay time at system boot in 9.0R. > > ipv6_up() in network.subr does this: > > + # wait for DAD > + sleep `${SYSCTL_N} net.inet6.ip6.dad_count` > + sleep 1 > > This happens for each and every interface, at a minimum (and default) of > two seconds per interface. > > It seems the behaviour was introduced with r197139. Before this merge, > /etc/rc.d/network_ipv6 did the same sleeps, but only once for the whole > network startup. > > I don't see why this should happen per interface, so I suggest the extra > sleeps are limited to "once per network startup" once again (or maybe > removed?). -- You can observe a lot just by watching. -- Yogi Berra Breadth of IT experience, and depth of knowledge in the DNS. Yours for the right price. :) http://SupersetSolutions.com/
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