dhclient taking all cpu
Brooks Davis
brooks at one-eyed-alien.net
Tue Jul 26 19:33:30 GMT 2005
On Mon, Jul 25, 2005 at 10:39:09PM -0400, Mike Jakubik wrote:
> 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.
Could you see what happens if you run dhclient in the foreground? Just
running "dhclient -d xl0" should do it. I'd like to know what sort of
output it's generating.
-- Brooks
--
Any statement of the form "X is the one, true Y" is FALSE.
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