From owner-freebsd-scsi Thu Oct 1 05:02:45 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id FAA06657 for freebsd-scsi-outgoing; Thu, 1 Oct 1998 05:02:45 -0700 (PDT) (envelope-from owner-freebsd-scsi@FreeBSD.ORG) Received: from nomis.simon-shapiro.org (nomis.simon-shapiro.org [209.86.126.163]) by hub.freebsd.org (8.8.8/8.8.8) with SMTP id FAA06645 for ; Thu, 1 Oct 1998 05:02:39 -0700 (PDT) (envelope-from shimon@simon-shapiro.org) Received: (qmail 4354 invoked by uid 1000); 1 Oct 1998 13:05:34 -0000 Message-ID: X-Mailer: XFMail 1.3 [p0] on FreeBSD X-Priority: 3 (Normal) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8bit MIME-Version: 1.0 Date: Thu, 01 Oct 1998 09:05:34 -0400 (EDT) X-Face: (&r=uR0&yvh>h^ZL4"-TH61PD}/|Y'~58Z# Gz&BK'&uLAf:2wLb~L7YcWfau{;N(#LR2)\i.l8'ZqVhv~$rNx$]Om6Sv36S'\~5m/U'"i/L)&t$R0&?,)tm0l5xZ!\hZU^yMyCdt!KTcQ376cCkQ^Q_n.GH;Dd-q+ O51^+.K-1Kq?WsP9;cw-Ki+b.iY-5@3!YB5{I$h;E][Xlg*sPO61^5=:5k)JdGet,M|$"lq!1!j_>? $0Yc? Reply-To: shimon@simon-shapiro.org Organization: The Simon Shapiro Foundation From: Simon Shapiro To: freebsd-scsi@FreeBSD.ORG, freebsd-current@FreeBSD.ORG Subject: DPT_RESET - Do We Still Need It? Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Please post back ONLY on FreeBSD-SCSI! Some time ago (pre-CAM) there was a need to disable the DPT driver feature which causes the controller to flush caches and shutdown during kernel shutdown. The problem manifested itself by shutting the kernel down (including calls to all registered at_shutdown functions), then proceeding to do massive I/O to the (already shutdown) disk subsystem. This was during kernel panics that resulted in kernel dumps. The ``feature'' I added to the DPT driver was to actually ignore the shutdown command and just introduce a delay instead. The Question: Do we still need the added feature, or does the kernel/CAM now shuts down as should have been (No I/O after closure)? Sincerely Yours, Shimon@Simon-Shapiro.ORG 770.265.7340 Simon Shapiro Unwritten code has no bugs and executes at twice the speed of mouth To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message