Date: Tue, 10 Sep 96 09:41:00 PDT From: Duncan Barclay <Duncan.Barclay@pa-consulting.com> To: freebsd-hackers <freebsd-hackers@freebsd.org> Subject: undocumented kernel priority changing Message-ID: <32359D17@SMTPGATE.PA-CONSULTING.COM>
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Hi
Does anyone know why the following is not documented (either in the
nice, renice, or getrlimit pages, and not in the 4.4 "daemon" book)
in kern_synch.c (2.1.0R, havent had time to put on 2.1.5R)
mi_switch()
...
/*
* Check if the process exceeds its cpu resource allocation.
* If over max, kill it. In any case, if it has run for more
* than 10 minutes, reduce priority to give others a chance.
*/
...
if (s > 10 * 60 && p->p_ucred->cr_uid && p->p_nice == NZERO)
{
p->p_nice = NZERO + 4;
resetpriority(p);
}
...
It took me a while to figure out what was nicing my processes (would you
believe it, one was an editor!). Whilst I acknowledge that a lot of people
wont
see this happening it is rather annoying to have it and it being not
documented (unlesws I missed it).
Shoot me if you will but a couple of config options may not go amiss, at
least for single/few user sites. I will plonk them in sometime soon.
Cheers
Duncan Barclay
help
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