From owner-freebsd-hardware Mon Apr 1 16:51:39 1996 Return-Path: owner-hardware Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id QAA17747 for hardware-outgoing; Mon, 1 Apr 1996 16:51:39 -0800 (PST) Received: from arnie.systems.sa.gov.au (arnie.systems.sa.gov.au [143.216.242.3]) by freefall.freebsd.org (8.7.3/8.7.3) with ESMTP id QAA17701 Mon, 1 Apr 1996 16:51:27 -0800 (PST) Received: from state.systems.sa.gov.au by arnie.systems.sa.gov.au (PMDF V4.3-7 #13538) id <01I3295BXWAO003G0B@arnie.systems.sa.gov.au>; Tue, 2 Apr 1996 10:07:58 +1030 Received: from dogbert.systems.sa.gov.au (dogbert.systems.sa.gov.au) by state.systems.sa.gov.au (PMDF V5.0-4 #13538) id <01I32928TV1C002QN2@state.systems.sa.gov.au>; Tue, 02 Apr 1996 10:04:56 +0930 Received: from jolt.systems.sa.gov.au (jolt.systems.sa.gov.au [143.216.237.8]) by dogbert.systems.sa.gov.au (8.6.12/8.6.12) with SMTP id KAA01485; Tue, 02 Apr 1996 10:10:46 +0930 Date: Tue, 02 Apr 1996 10:23:35 +0930 From: Garth Kidd Subject: Re: Cannot boot after install In-reply-to: Brett Glass <"Re: Cannot boot after install"@state.systems.sa.gov.au> (Apr 1, 9:46) To: Brett Glass , Michael Smith Cc: hdalog@zipnet.net, davidg@Root.COM, hardware@FreeBSD.org, bugs@FreeBSD.org Message-id: <960402110732.ZM2871@jolt.systems.sa.gov.au> MIME-version: 1.0 X-Mailer: Z-Mail 4.0 (4.0.0 Aug 21 1995) Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7BIT References: <9603018283.AA828378286@ccgate.infoworld.com> Sender: owner-hardware@FreeBSD.org X-Loop: FreeBSD.org Precedence: bulk Brett Glass wrote: > The kernel hack I did (turning off the power-saving mode) is appropriate > for desktop machines; in fact, for them, it's a good idea. But it's NOT > appropriate for laptops and other low-power applications. The kernel > needs to be fixed so that the drive *can* spin down without locking up > the entire machine. That might be fine for normal filesystem access, Brett, but consider your poor swap partition. If a page fault occurs, the kernel's just going to have to sit around and wait for the drive to spin up, ne? Unless you want to re-write the scheduler so that processes can only get CPU when all of their pages are in memory at the time, you're going to have to either put up with 30-second hangs or run with no swap. -- garth@dogbert.systems.sa.gov.au | Garth Kidd +61-8-207-7740 (voice) | Professional Services Division +61-8-207-7860 (fax) | Southern Systems | Adelaide, AUSTRALIA