Date: Mon, 10 Feb 2003 22:04:23 -0600 From: Juli Mallett <jmallett@FreeBSD.org> To: Peter Wemm <peter@wemm.org> Cc: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sbin/newfs Makefile mkfs.c newfs.c newfs.h ref.test Message-ID: <20030210220423.A36674@FreeBSD.org> In-Reply-To: <20030211035711.22D9C2A8B4@canning.wemm.org>; from peter@wemm.org on Mon, Feb 10, 2003 at 07:57:11PM -0800 References: <200302110306.h1B36k0p057099@repoman.freebsd.org> <20030211035711.22D9C2A8B4@canning.wemm.org>
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* De: Peter Wemm <peter@wemm.org> [ Data: 2003-02-10 ] [ Subjecte: Re: cvs commit: src/sbin/newfs Makefile mkfs.c newfs.c newfs.h ref.test ] > Juli Mallett wrote: > > jmallett 2003/02/10 19:06:46 PST > > > > Modified files: > > sbin/newfs Makefile mkfs.c newfs.c newfs.h ref.test > > Log: > > Convert newfs to libufs (really). Solves one real issue with previous > > version of such. Differences in filesystems generated were found to be > > from 1) sbwrite with the "all" parameter 2) removal of writecache. The > > sbwrite call was made to perform as the original version, and otherwise > > this was checked against a version of newfs with the write cache removed. > > Umm, I object! This is a massive performance loss on disks without track > write buffering (eg: many raid systems).. While it isn't so bad for ufs2 > newfs, it is a Big Deal for ufs1 for interchangeability. OK. I was kind of hoping to put a general write cache (and since we do reads, a general buffer cache, in a sense) into libufs, but I suppose I could just put back the wc stuff, and avoid calling into libufs for anything other than bread/bwrite. Which would you prefer? Do you know of anything other than newfs where it matters? Thanx, juli. -- Juli Mallett <jmallett@FreeBSD.org> AIM: BSDFlata -- IRC: juli on EFnet OpenDarwin, Mono, FreeBSD Developer ircd-hybrid Developer, EFnet addict FreeBSD on MIPS-Anything on FreeBSD To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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