Asri-unix.539
net.unix-wizards
utcsrgv!utzoo!decvax!ucbvax!hpvax!sri-unix!MBM@MIT-XX
Sat Jan 16 08:04:06 1982
nice
certain programs as a priori entitled to better schdeduling
service than others. In particular, we would like to favor
screen editors and other human interactive programs at the
expense of number crunchers, but the question is general.
We have been making such jobs setuid to root and having them
minus nice themselves, but this seems messy, dangerous, and
a nuisance.
Several possibilities are being considered:
1) use setgid instead, and let group 0 (or some group(s))
reduce their nice; this is somewhat less dangerous.
2) use the SVTX bit (sticky text) to also mean for the scheduler
to be more generous with jobs using such text (I could never
be sure that sticky text helped much anyway)
3) perhaps in conjunction with 2, use the unused word in the
a.out header for the base nice priority
Yes, I know I could just make a front end for each such program ,
but that seems just as messy as editing every program to nice
itself and then do setuid(getuid). Comments?
--mike
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