Date: Tue, 5 Feb 2002 20:28:09 -0800 From: Alfred Perlstein <bright@mu.org> To: "M. Warner Losh" <imp@village.org> Cc: tlambert2@mindspring.com, cjclark@alum.mit.edu, cristjc@earthlink.net, mike@FreeBSD.ORG, freebsd-arch@FreeBSD.ORG Subject: Re: Setting sysctl(8)'s in rc.conf Message-ID: <20020205202809.C59017@elvis.mu.org> In-Reply-To: <20020205.210025.88474927.imp@village.org>; from imp@village.org on Tue, Feb 05, 2002 at 09:00:25PM -0700 References: <20020205121345.B368@gohan.cjclark.org> <20020205.135658.102576700.imp@village.org> <3C609B28.4B040672@mindspring.com> <20020205.210025.88474927.imp@village.org>
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* M. Warner Losh <imp@village.org> [020205 20:01] wrote: > In message: <3C609B28.4B040672@mindspring.com> > Terry Lambert <tlambert2@mindspring.com> writes: > : Will this let them be set before load? > > Yes. > > : There's a bad assumption in tunables, that they may be > : tuned after boot time, which is not true for things > : like sizes of zalloci() zones, which must be contiguous, > : and whose size prevents reallocation, and whose use > : before reallocation would lead to fragmentation. > > No. Tunables can't be set after boot time. They are hints in the > kenrel env that people get to with the TUNABLE* macros. Maybe you are > thinking of sysctls? No, I think he meant compile time instead of boot time, someone may set maxuser = 0 via loader and cause bad behaviour, he seems to want a loader tunable for this. -- -Alfred Perlstein [alfred@freebsd.org] 'Instead of asking why a piece of software is using "1970s technology," start asking why software is ignoring 30 years of accumulated wisdom.' Tax deductable donations for FreeBSD: http://www.freebsdfoundation.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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