swap
Piercarlo Grandi
pcg at aber-cs.UUCP
Thu Jul 6 23:11:09 AEST 1989
In article <368 at trevan.UUCP> trevor at trevan.UUCP (trevor) writes:
The distribution Microport V/AT has a swap device witha major
number of 1 and minor of 198. This is infact the mem device.
The kernel on the floppy uses a ramdisk for swapping so that the bootable
floppy can be read only. You absolutely don't want a hard disk rooted system
to continue swapping to the ramdisk. Indeed you may want to remove the
ramdisk from the hard disk kernel configuration (in favour of larger buffer
chaches).
I suspect that it is redundant as the swap devices are also contained in
the dsk and rdsk directories.
The kernel only obeys the "swapdev" definition given when it is built; it
completely ignores the /dev*swap device files. The /dev*swap device files are
used by "ps" (mainly) to read the u-area/stack of swapped out processes. It
is the system administrator's responsibility that the /dev/*swap devices map
onto the same partition indicated in the "swapdev" variable definition; if
they are not, "ps" (and some other commands) will just report incorrect
things.
--
Piercarlo "Peter" Grandi | ARPA: pcg%cs.aber.ac.uk at nsfnet-relay.ac.uk
Dept of CS, UCW Aberystwyth | UUCP: ...!mcvax!ukc!aber-cs!pcg
Penglais, Aberystwyth SY23 3BZ, UK | INET: pcg at cs.aber.ac.uk
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