Here is the question:
I would like to perform some system tuning and following directions
from "System Tuning and Performance Management" I tried to use
dbx -k /vmunix /dev/mem in our three machines in order to change
some kernel parameters. In the first machine, which runs DU
V3.2C (Rev. 148) I faced no problem. But in the other two
machines I got the following error messages:
--------
dbx version 3.11.6
Type 'help' for help.
l3 address 0xffffffff9be38000 not mapped, pte 0x0
program is not active
Exiting due to error during startup
for the one that is running DU V3.0B (Rev. 358.78) and
--------
dbx version 3.11.4
Type 'help' for help.
dbx: fatal error: cannot debug /vmunix (did you specify a non-existing cor
e file?)
for the one that is running DU V2.0 (Rev. 240).
Any ideas of what is going on?
****************************************
Thanks to:
martin_at_jerry.alf.dec.com (Martin Moore)
phjessen_at_bk.dk (Paul Hostrup-Jessen)
kluge_at_ave.ac.agit.de (Steffen Kluge)
for their replies.
The problem with version V2.0 is that I was trying to debug by
su'ing to root. This does not work; I should have logged in as root
from the beginning of the session.
Concerning to version V3.0B there is a bug caused by "...kloadsrv, in which
it saved state information in pageable memory rather than wired memory,
thus not saving some of this info in the crash dump". There is a patch
(OSFV305-206-1) that is not available by anonymous ftp. Contact service
provided by Digital.
Another way to change kernel parameters is through a non-dynamical way, i.e.,
by editing the kernel configuration file and building a new kernel.
Oyanarte
Oyanarte Portilho
Dept. of Physics
Univ. of Brasilia
Brazil
Received on Fri Jan 26 1996 - 12:51:20 NZDT