Very slow password validation

Tomas Mraz tmraz at redhat.com
Thu Jul 31 10:00:08 UTC 2008


On Wed, 2008-07-30 at 23:22 -0400, Jim Cornette wrote:
> David Timms wrote:
> > Jim Cornette wrote:
> >> Clyde E. Kunkel wrote:
> >>> After rawhide update of 20080726, validation of root password is 
> >>> taking (subjectively) a very long time, about 20-25 seconds.
> >>>
> >>> Anyone else seeing this?
> >>> .
> >>
> >> Yes, logging in an su - terminal took about half a minute.
> > I've noticed that on some of my F9 machines, from remote. The delay is 
> > between ssh server, and getting back the login prompt. From memory, 
> > machine tries a dns lookup of the machine name to see if it matches ip, 
> > which eventually times out, and continues.
> > 
> > Is that where is occurs {ie which commmand, from where, to where, when 
> > is the delay ?
> > 
> > DaveT.
> > 
> 
> AS with Clyde, it is in gnome-terminal issuing the su - command
> I have ssh disabled.

Can you strace the process and see where it is waiting? You will have to
attach the strace to the su process from another root shell of course.
-- 
Tomas Mraz
No matter how far down the wrong road you've gone, turn back.
                                              Turkish proverb




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