[comp.os.minix] A good idea for swapping ??

rtregn@immd3.informatik.uni-erlangen.de (Robert Regn) (01/30/89)

In article <7118@louie.udel.EDU>, mcvax!melkart!tih@uunet.uu.net writes:
> Of course, when I started using mined with that kernel remake in the
> background the make aborted because it couldn't run /lib/cem -- anyone
> want to volunteer to implement swapping?  :-)

This is indeed a big reason of anger!

In article  <1205@botter.cs.vu.nl> ast@cs.vu.nl (Andy Tanenbaum) writes:
(a very old article from 10 Jun 87 )
> Most of the problems are caused by my desire to make the system run with a
> 256K 1 floppy disk system, and run reasonably well with a 640K 2 floppy disk
> system.  In other words, I do not assume that people have a hard disk.
> 
> 6) No swapping.  Ever try swapping to a floppy?  I did.  The first version of
>    MINIX did just that.  To make a long story short, it didn't work real good.
>    It was a lot of code, so I threw it away.
> 

What's the opinion of the people on the net about swapping on the extended
memory of an AT ? Many AT's have over 1 Meg of it.
If the swapping code already exists (see above) and is compatible to 1.3,
this project can be simple (using the bios for accessing the mem).
Using a 1 MB ram disk makes no sense. It wastes disk space for the root image
and time when booting. One might split the memory into 512K ram disk
and 512K swap space, for example.
If we have code to check the size of ext. mem, the compatibility to 8088
is saved.

Robert Regn					Phone 09131 857913
rtregn@faui32.uucp
rtregn@immd3.informatik.uni-erlangen.de

ast@cs.vu.nl (Andy Tanenbaum) (01/31/89)

In article <822@faui10.informatik.uni-erlangen.de> rtregn@immd3.informatik.uni-erlangen.de (Robert Regn) writes:
>Using a 1 MB ram disk makes no sense.

Not true.  I keep /bin and /lib there.  Also /tmp.  Virtually all programs,
compiler passes, temporary files, pipes, etc. use the RAM disk.  This makes
things nice and speedy.

Andy Tanenbaum (ast@cs.vu.nl)