[1936] in RedHat Linux List
Re: w
daemon@ATHENA.MIT.EDU (Timo Karjalainen)
Wed Oct 30 20:13:28 1996
Date: Thu, 31 Oct 1996 03:10:37 +0200 (EET)
From: Timo Karjalainen <wizzo@pc164103.oulu.fi>
To: redhat-list@redhat.com
In-Reply-To: <Pine.SOL.3.95.961031004114.21584A-100000@hammer.thor.cam.ac.uk>
Resent-From: redhat-list@redhat.com
Reply-To: redhat-list@redhat.com
On Thu, 31 Oct 1996, Philip Blundell wrote:
> On Thu, 31 Oct 1996, Timo Karjalainen wrote:
>
> > > The "PCPU" and "WHAT" columns don't seem to be very useful, and I'm
> > > somewhat suspicious of JCPU as well. Does anybody have a fix for this
> > > problem?
> >
> > rm /etc/psdevtab
> >
> > ...and try w after that and it should work...
>
> Cool, it worked. What's psdevtab for, exactly, and how did I end up with
> a broken one?
From ps man-page:
To perform the device number to name mapping ps maintains a file called
"/etc/psdevtab" (updated whenever "/dev" becomes newer and permissions allow
update). If permissions do not allow update, every invokation of ps requires a
stat(2) of every file in the "/dev" directory. If "/dev" changes often on
your system you should run ps as root often. ;-)
I ended up with a broken psdevtab after upgrading to MAKEDEV-2.2-5 which
allows those 256 ptys... I ran MAKEDEV and next time when I logged in I
noticed that PCPU & WHAT fields were all mixed up... It took a few days to
find out what was wrong but basically I was just trying out everything
and ended up with that being the solution so...
-Timo-
wizzo@pc164103.oulu.fi
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