Messages in this thread | | | From | Peter Samuelson <> | Date | Sun, 14 Nov 1999 15:41:27 -0600 (CST) | Subject | Re: User lowering&raising priority of his processes, is it possible? |
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[Anatoly Akkerman] > I was trying to manage processes purely from user space for my > research project and bumped into a policy that seems a little strange > to me. Linux lets users only lower priority of their processes. Now, > once the priority is lowered, you can't raise it back. Why not?!
That would entail keeping min_nice as part of process state. And you need to add an interface to change min_nice (with the same restrictions as current nice value, that is, need CAP_SYS_NICE to decrease value), and you need to work out what happens with a setuid-root execpv(), and you need to work out what happens after set*uid() calls, and you may need to worry about breaking old software that doesn't know about the nice-min interface and assumes that if it does "fork(); nice(); execl()" the child will not be able to un-nice itself.
Roll up a patch; I'm sure someone could find it useful.
-- Peter Samuelson <sampo.creighton.edu!psamuels>
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