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SubjectRe: Unbloating the kernel, was: :mem=16MB laptop testing
On Tue, 14 Oct 2003 wrote:

> On Tue, Oct 14, 2003 at 09:24:17AM -0400, Rik van Riel wrote:
> > On Tue, 14 Oct 2003, Marco Fioretti wrote:
> >
> > > There are literally thousands of schools, all over the world, which
> > > simply cannot afford any money on computers. The "HW is cheap" slogan is
> > > very cruel when recited in places where 64 MB of RAM are one month's
> > > salary. I am not kidding.
> Let me concur with the sentiments on this thread.
> When I started using Linux, it was on a 40 MHz 386 with 8Megs of ram and
> a 200 Meg HD. This was a reasonably typical machine for the time (1993).
> I ran X on this machine, and it was fine running several Xterms and you
> could play the X version of Tetris or gnuchess. I used this machine to
> write the program I was working on for my Masters degree.


Booting Linux-2.4.22 with mem=16M, I can still compile the
kernel as `make -j 16 bzImage` with the following resources:

total: used: free: shared: buffers: cached:
Mem: 14544896 14118912 425984 0 274432 6713344
Swap: 1069268992 16510976 1052758016
MemTotal: 14204 kB
MemFree: 416 kB
MemShared: 0 kB
Buffers: 268 kB
Cached: 3264 kB
SwapCached: 3320 kB
Active: 5980 kB
Inactive: 2944 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 14204 kB
LowFree: 388 kB
SwapTotal: 1044208 kB
SwapFree: 1028084 kB

After a `make clean`, this configuration normally takes
about 3 minutes to compile. With mem=16M, it takes about
12 minutes. Not too bad.

The kernel is as 'modular' as one can make it. I don't have
any built-in stuff that I don't use. This helps keep it
small. is growing in size for no obvious gain.
-rwxr-xr-x 1 root root 1532520 Mar 13 2003 vmlinux
^^^^^^^___ linux-2.4.20
-rwxr-xr-x 1 root root 1567340 Oct 14 09:39 vmlinux
^^^^^^^___ linux-2.4.22
Both of these kernels have the exact configuration and are
built with the exact same tools.

Dick Johnson
Penguin : Linux version 2.4.22 on an i686 machine (797.90 BogoMips).
Note 96.31% of all statistics are fiction.

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