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Date:      Fri, 09 Mar 2001 19:05:59 +1030 (CST)
From:      "Daniel O'Connor" <doconnor@gsoft.com.au>
To:        Mikhail Kruk <meshko@cs.brandeis.edu>
Cc:        stable@freebsd.org, Andrew Hesford <ajh3@chmod.ath.cx>
Subject:   Re: top/systat
Message-ID:  <XFMail.010309190559.doconnor@gsoft.com.au>
In-Reply-To: <Pine.LNX.4.30.0103090326150.23474-100000@daedalus.cs.brandeis.edu>

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On 09-Mar-01 Mikhail Kruk wrote:
> > In either case, the kernel symbols aren't loaded, and top relies on
> > them.
>  
>  btw this doesn't seem to make sense. I'd appreciate if you point me to
>  something that would clarify this to me. I don't understand how top and
>  friends use the symbols in kernel and I feel that I would like to know
>  that.

top et al open /dev/kmem (which is a file by which you can read kernel memory) and
then look for these symbols and read the data straight out of kernel space..

Efficient but gross :)

---
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum

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