Date: Fri, 7 Jul 2000 09:11:35 -0700 From: Alfred Perlstein <bright@wintelcom.net> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: Bill Fumerola <billf@chimesnet.com>, Marius Bendiksen <mbendiks@eunet.no>, freebsd-arch@FreeBSD.ORG Subject: Re: Alterations to vops Message-ID: <20000707091134.M25571@fw.wintelcom.net> In-Reply-To: <200007071543.IAA00597@apollo.backplane.com>; from dillon@apollo.backplane.com on Fri, Jul 07, 2000 at 08:43:22AM -0700 References: <Pine.BSF.4.05.10007062327020.68909-100000@login-1.eunet.no> <200007070143.SAA96248@apollo.backplane.com> <20000706184859.C25571@fw.wintelcom.net> <20000706215543.Z4034@jade.chc-chimes.com> <200007071543.IAA00597@apollo.backplane.com>
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* Matthew Dillon <dillon@apollo.backplane.com> [000707 08:43] wrote: > > My intention was to turn on vmiodirenable by default, but I got stalled > on an obscure bug or two related to softupdates. That was a long time > ago.. at least 6 months, probably more. It could very well be that > the problems no longer exist. My intention is also at some point to > remove the crufty malloc space feature in the buffer cache. It was > originally designed to 'save memory' by packing small filesystem blocks > rather then using the mandatory minimum of one page (4K on i386) that > anything backed by the VM Page cache requires. For example, most > small directories fit in much less then 4K. The concept is sound, > but the implementation has severe scaling problems. A wishlist item could be packing these directories into pages through some sort of indirection mechanism. 2cents. :) -Alfred To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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