Date: Mon, 25 Jul 2005 22:39:09 -0400 (EDT) From: "Mike Jakubik" <mikej@rogers.com> To: "Brooks Davis" <brooks@one-eyed-alien.net> Cc: freebsd-current@freebsd.org Subject: Re: dhclient taking all cpu Message-ID: <4901.172.16.0.199.1122345549.squirrel@172.16.0.1> In-Reply-To: <20050726015428.GF20597@odin.ac.hmc.edu> References: <42E58007.9030202@rogers.com> <20050726004246.GA20597@odin.ac.hmc.edu> <42E595C3.2070003@rogers.com> <20050726015428.GF20597@odin.ac.hmc.edu>
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On Mon, July 25, 2005 9:54 pm, Brooks Davis said: >>> Probably something wrong with your interface, but you havent't >>> provided any useful information so who knows. At the very least, I >>> need to know what interface you are running on, something about it's >>> status, and if both dhclient processes are running. >>> >> The interface is xl0 (3Com 3c905C-TX Fast Etherlink XL), and it worked >> in this machine fine for as long as i remember. This seems to have >> happened since a recent cvsup and buildworld from ~6-BETA to 7-CURRENT. >> I rebooted three times, and the problem occured rougly a minute after >> bootup. On the fourth time however, it seems to be ok so far. > > That sounds like a problem with the code that handles the link state > notifications in the interface driver. The notifications are a reletivly > new feature that we're only now starting to use heavily so there are going > to be bumps in the road. It would be intresting to know if you see link > state messages promptly if you plug and unplug the network cable. It seems to be back at it again, this time it took longer to kick in. Here is a "ps auxw|grep dhclient" : _dhcp 219 93.5 0.2 1484 1136 ?? Rs 8:49PM 5:06.00 dhclient: xl0 (dhclient) root 193 0.0 0.2 1484 1088 d0- S 8:49PM 0:00.02 dhclient: xl0 [priv] (dhclient) top: PID USERNAME THR PRI NICE SIZE RES STATE TIME WCPU COMMAND 219 _dhcp 1 129 0 1484K 1136K RUN 9:33 94.24% dhclient Nothing in dmesg about link state changes on xl0. Unplugging and replugging the network cable results in link state notification within a couple seconds.
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