Date: Thu, 15 Mar 2001 09:54:51 +1100 (EST) From: Iain Templeton <iain@research.canon.com.au> To: Alfred Perlstein <bright@wintelcom.net> Cc: chat@freebsd.org Subject: Re: Disk I/O problem in 4.3-BETA Message-ID: <Pine.LNX.4.10.10103150931040.3321-100000@blow.research.canon.com.au> In-Reply-To: <20010312151315.F18351@fw.wintelcom.net>
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On Mon, 12 Mar 2001, Alfred Perlstein wrote: [redirected to -chat, hopefully] > > It's actually worse. Someone, I forget who, ran some tests with > > write-caching turned on and found that the IDE drive could hold a > > pending write in its cache 'forever', even in the face of other writes, > > as long as there was other disk activity going on. So we aren't just > > talking about issuing I/O's out of order, we are talking about issuing > > a sequence of writes and having some of them simply not ever commiting > > to disk (not for a long, long time) in a heavily loaded environment. > > That's bad news. > > Someone leaked the Linux austrailian elevator algorithm to the disk > manufacturers? > As an elevator user in Australia I'm intrigued by this comment? I know our elevators at work can play up ("No I said up to the 5th, not down to B1!"). Iain To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-chat" in the body of the message
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