From owner-freebsd-current Fri Nov 27 19:50:42 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id TAA29179 for freebsd-current-outgoing; Fri, 27 Nov 1998 19:50:42 -0800 (PST) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from godzilla.zeta.org.au (godzilla.zeta.org.au [203.15.68.22]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id TAA29172 for ; Fri, 27 Nov 1998 19:50:39 -0800 (PST) (envelope-from bde@godzilla.zeta.org.au) Received: (from bde@localhost) by godzilla.zeta.org.au (8.8.7/8.8.7) id OAA17888; Sat, 28 Nov 1998 14:50:29 +1100 Date: Sat, 28 Nov 1998 14:50:29 +1100 From: Bruce Evans Message-Id: <199811280350.OAA17888@godzilla.zeta.org.au> To: current@FreeBSD.ORG, rock@wurzelausix.CS.Uni-SB.DE Subject: Re: ALI Aladdin V and 2nd IDE channel Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG >I have an Aladdin V chipset and the 2nd IDE channel is only detected if >I insert >options DISABLE_PCI_IDE >in my kernel config file. This option is nowhere documented but only with >this option enabled my secondary IDE channel and its CDROM drive is detected >properly. I didn't notice any performance degradation on the 1st IDE channel. >(I get 11 MB/s with only 5% CPU usage) > >What does this option do exactly? I think it just bypasses broken unit number handling. See a recent PR. Patches for this have been floating around for more than a year, but are said to be broken in different ways. 11 MB/s takes at least 11/16.6*100% CPU in PIO mode. Reports of 5% mean that the CPU meter is broken. The CPU meter in `systat -vmstat' should work. >Could it be somewhere documented (at least >in options.i386, so I don't get the warning message from config?) Or is there No. The warning should be as annoying. Bruce To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message