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Subject: TCP-Group Digest 96/262A
X-BBS-Msg-Type: B
TCP-Group Digest Tue, 24 Dec 96 Volume 96 : Issue 262
Today's Topics:
Linux Kernel AX.25 in 4 Meg (6 msgs)
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----------------------------------------------------------------------
Date: Mon, 23 Dec 1996 07:42:57 -0500 (EST)
From: "Brian A. Lantz" <brian@lantz.com>
Subject: Linux Kernel AX.25 in 4 Meg
On Mon, 23 Dec 1996, Terry Dawson wrote:
> Steve Sampson wrote:
>
> > My conclusion, is that a 2.1.x kernel cannot operate in 4 Meg of RAM.
> > I'm now considering going to the Dallas swap meet to get some more
> > 33 pin memory, or just putting JNOS on it :-) One thing I do like
> > about the NOS's is the addition of TCP compression. Something sorely
> > needed for 9600 and below.
>
> The stability problem is a 2.1.14 issue. The 2.1.* kernels are
> very alpha at the moment and in the middle of huge changes.
> You should repeat your testing with the production 2.0.27 kernel.
>
> I can't speak for 2.1.* as I haven't yet tried it in that configuration,
> but 4Mb is enough for a Linux based router without any end-user services
> with 2.0.*.
Sometimes even WITH user services, in my experience. I know of several
TNOS/Linux boxes on low-CPU boxes with 4Meg of Ram and swap. One ran 130
days with no problems, and would have more, but had to be rebooted to add
additional hardware.
-----------------------------------------------------------
Brian A. Lantz http://www.lantz.com brian@lantz.com
REAL PORTION of Microsoft Windows code:
while (memory_available) {
eat_major_portion_of_memory (no_real_reason);
if (feel_like_it)
make_user_THINK (this_is_an_OS);
gates_bank_balance++;
}
------------------------------
Date: Tue, 24 Dec 1996 08:25:43 +1100
From: Terry Dawson <terry@perf.no.itg.telstra.com.au>
Subject: Linux Kernel AX.25 in 4 Meg
Brian A. Lantz wrote:
> > The stability problem is a 2.1.14 issue. The 2.1.* kernels are
> > very alpha at the moment and in the middle of huge changes.
> > You should repeat your testing with the production 2.0.27 kernel.
> >
> > I can't speak for 2.1.* as I haven't yet tried it in that configuration,
> > but 4Mb is enough for a Linux based router without any end-user services
> > with 2.0.*.
>
> Sometimes even WITH user services, in my experience. I know of several
> TNOS/Linux boxes on low-CPU boxes with 4Meg of Ram and swap. One ran 130
> days with no problems, and would have more, but had to be rebooted to add
> additional hardware.
Certainly, I should have been more specific. Our gateway is a 386sx16/4M
with 4Mb of swap and we run just about all of the radio services on it.
We've done no special optimisiations, just an off the shelf debian-1.1
distribution with the ax25-utils added.
I was referring to the 4M without swap (the single floppy disk) case.
Terry
------------------------------
Date: Mon, 23 Dec 1996 18:29:53 -0600
From: Steve Sampson <ssampson@oklahoma.net>
Subject: Linux Kernel AX.25 in 4 Meg
Interesting responses. I think I made my biggest mistake by
first downloading the ax25 utilities. Somewhere in there it
stated I needed a kernel greater than xxx (where I forget
what xxx was). This was what drove me to just get the latest
kernel. I realize of course that the 2.1 stuff is experimental,
but I figured what the heck...
I'll probably just upgrade the RAM, as linux, while it will
work, is just not at the speed I'm used to. I know you will
all step in and advise me that yours is "just fine" but really,
it's just a dog with 4 meg of RAM, and swap space just isn't
the same. Now if your running a EIDE with 10 ms drives, then
maybe you can make a case, but my old Seagate just isn't of that
breed. Comparing the 4 Meg box to my 32 Meg box is like the
difference between night and day.
To be continued in digest: tcp_96_262B
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