From owner-freebsd-hackers Tue Feb 23 17:35:29 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from smtp04.primenet.com (smtp04.primenet.com [206.165.6.134]) by hub.freebsd.org (Postfix) with ESMTP id 3CF5D11590 for ; Tue, 23 Feb 1999 17:35:25 -0800 (PST) (envelope-from tlambert@usr09.primenet.com) Received: (from daemon@localhost) by smtp04.primenet.com (8.8.8/8.8.8) id SAA28829; Tue, 23 Feb 1999 18:56:29 -0700 (MST) Received: from usr09.primenet.com(206.165.6.209) via SMTP by smtp04.primenet.com, id smtpd028745; Tue Feb 23 18:56:20 1999 Received: (from tlambert@localhost) by usr09.primenet.com (8.8.5/8.8.5) id SAA24729; Tue, 23 Feb 1999 18:35:00 -0700 (MST) From: Terry Lambert Message-Id: <199902240135.SAA24729@usr09.primenet.com> Subject: Re: Panic in FFS/4.0 as of yesterday To: Don.Lewis@tsc.tdk.com (Don Lewis) Date: Wed, 24 Feb 1999 01:34:59 +0000 (GMT) Cc: tlambert@primenet.com, dillon@apollo.backplane.com, dfr@nlsystems.com, freebsd-hackers@FreeBSD.ORG In-Reply-To: <199902221423.GAA28922@salsa.gv.tsc.tdk.com> from "Don Lewis" at Feb 22, 99 06:23:29 am X-Mailer: ELM [version 2.4 PL25] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > } I think the way to "fix" this is to have two queue insertion points, > } and insert directory writes as far forward as you can (some pigs are > } more equal than others). This would ensure short duration for > } directory operations. > > What about directory reads? I think the same problem will occur if > they have long latencies. It's my understanding that having a single queue for both reads and write to a device went out with VMS. 8-). Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message