Date: Sun, 28 Nov 1999 22:49:28 +0100 (CET) From: Andrzej Bialecki <abial@webgiro.com> To: Poul-Henning Kamp <phk@critter.freebsd.dk> Cc: cvs-committers@freebsd.org, cvs-all@freebsd.org Subject: Re: cvs commit: src/sys/conf options src/sys/dev/md md.c src/sys/i386/conf GENERIC LINT PCCARD src/sys/kern vfs_conf.c src/sys/sys conf.h src/sys/ufs/mfs mfs_vfsops.c Message-ID: <Pine.BSF.4.05.9911282246430.82945-100000@freja.webgiro.com> In-Reply-To: <18152.943825486@critter.freebsd.dk>
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On Sun, 28 Nov 1999, Poul-Henning Kamp wrote: > In message <Pine.BSF.4.05.9911282233270.82278-100000@freja.webgiro.com>, Andrze > j Bialecki writes: > > >Ok, that was one thing. What about its impact on VM resources? I had a > >look at the sources, and the look quite simple compared to MFS. From my > >cursory look it seems, though, that MD will truely reserve all memory tha > >you requested at compile time, and it's not pageable, whereas MFS could > >use it up as needed (except that it wouldn't give it back :-)... > > For MFS_ROOT it works *EXACTLY* the same. Same kind of memory, same > properties etc etc etc. Ok. I need to go to bed... ;-) ...but IIRC, MFS wasted more space than needed because the same pages were kept in memory twice - one copy for the original bloc,the other for cache. Is thi the same here? Andrzej Bialecki // <abial@webgiro.com> WebGiro AB, Sweden (http://www.webgiro.com) // ------------------------------------------------------------------- // ------ FreeBSD: The Power to Serve. http://www.freebsd.org -------- // --- Small & Embedded FreeBSD: http://www.freebsd.org/~picobsd/ ---- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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