From owner-freebsd-current Mon Jul 30 9:28:37 2001 Delivered-To: freebsd-current@freebsd.org Received: from mail.wrs.com (unknown-1-11.windriver.com [147.11.1.11]) by hub.freebsd.org (Postfix) with ESMTP id B7E2737B405 for ; Mon, 30 Jul 2001 09:28:24 -0700 (PDT) (envelope-from jhb@FreeBSD.org) Received: from laptop.baldwin.cx (john@[147.11.46.217]) by mail.wrs.com (8.9.3/8.9.1) with ESMTP id JAA29602; Mon, 30 Jul 2001 09:28:05 -0700 (PDT) Message-ID: X-Mailer: XFMail 1.4.0 on FreeBSD X-Priority: 3 (Normal) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8bit MIME-Version: 1.0 In-Reply-To: <20010729190011.B810@xor.obsecurity.org> Date: Mon, 30 Jul 2001 09:28:06 -0700 (PDT) From: John Baldwin To: Kris Kennaway Subject: RE: -current lockups Cc: current@FreeBSD.org Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On 30-Jul-01 Kris Kennaway wrote: > Hi all, > > For the past 2 or 3 weeks my -current system has been experiencing > temporary lockups, usually under disk load. The entire system will > hang for around 20-30 seconds, during which time absolutely no > network/IO/keyboard/mouse activity is accepted. Usually, after 20-30 > seconds the system will unwedge and activity will resume, but > sometimes it hangs forever. There are no console messages logged by > this event. I cannot break into DDB until after system activity > resumes normally. > > My system is a PPro 233 using IDE drives. Has anyone else seen > something like this? I see this on my laptop sometimes, always accompanied by heavy disk I/O during the entire interval. Since disk interrupts are higher priority than TTY interrupts right now (no disk drivers use the PI_DISKLOW priority, partially because there is no mechanism for them to do so right now) if a continual stream of disk interrupts keeps the disk driver ithread busy, we will starve TTY ithreads such as the one for keyboard and mouse. > Kris -- John Baldwin -- http://www.FreeBSD.org/~jhb/ PGP Key: http://www.baldwin.cx/~john/pgpkey.asc "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message