Date: Thu, 19 Apr 2001 21:50:20 +0400 From: "Andrey A. Chernov" <ache@nagual.pp.ru> To: Matt Dillon <dillon@earth.backplane.com> Cc: Maxim Sobolev <sobomax@FreeBSD.ORG>, Doug Barton <DougB@DougBarton.net>, "Alfred Perlstein <bright@wintelcom.net> 'current@freebsd.org'" <current@FreeBSD.ORG> Subject: Re: FW: Filesystem gets a huge performance boost Message-ID: <20010419215020.A69376@nagual.pp.ru> In-Reply-To: <200104191747.f3JHlK156009@earth.backplane.com>; from dillon@earth.backplane.com on Thu, Apr 19, 2001 at 10:47:20AM -0700 References: <200104162146.f3GLkGT82369@earth.backplane.com> <3ADBF9FA.9D1C4DB4@DougBarton.net> <20010417011335.V976@fw.wintelcom.net> <3ADC0221.32127C39@DougBarton.net> <3ADEDE2F.573C20A1@FreeBSD.org> <200104191632.f3JGWVG54689@earth.backplane.com> <3ADF1F36.44A3AA54@FreeBSD.org> <200104191739.f3JHdw255890@earth.backplane.com> <20010419214230.A69239@nagual.pp.ru> <200104191747.f3JHlK156009@earth.backplane.com>
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On Thu, Apr 19, 2001 at 10:47:20 -0700, Matt Dillon wrote: > :> set that default in stone and prevent us from being able to change > :> it with a new kernel rev. This being a *kernel* specific feature, > :> we need to have control over the default in the kernel itself. > : > :What about simple check in the kernel: if total memory is above 64Mb, then > :enable this mode by default, else disable it. > : > :-- > :Andrey A. Chernov > > You are assuming that turning on vmiodirenable is detrimental on a > low-memory machine. I don't think it is, because on a low memory > machine you aren't going to be able to cache very much anyway. But if > anyone thinks it is please be my guest and test it on a low-memory > machine on verses off. Personally I not test this thing, just assume that current etc/sysctl.conf comment about 64Mb limit is correct, i.e. assume that sysctl.conf commiter already test it. -- Andrey A. Chernov http://ache.pp.ru/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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