Subject: re: Turning off autonice by default
To: Jason Thorpe <email@example.com>
From: matthew green <firstname.lastname@example.org>
Date: 09/28/2004 05:50:52
> I think it makes no sense in todays configurations and workloads. It
> be turned on via sysctl, but it should not be on by default.
I agree, disable it. Really, it should never have been added in the
first place. Judging by some scheduler fixes that went in after
autonicetime was added, I can only assume that it was a misguided hack
to mask over some of those scheduler bugs.
the behaviour comes from 4BSD and used to be hard-coded to happen
to all non-root procs that used >10mins of CPU and had nice=0. in
the old days we used to renice daemons to 1 early to avoid them
being reniced to 4 at some later time...for a long time my kernels
#if 0'ed that code out. later i started using the sysctl's after
they were added...