Date: Wed, 5 Jan 2000 12:40:02 -0800 (PST) From: Soren Schmidt <sos@freebsd.dk> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/15923: ATA/EIDE DMA does not work with some hardware (ALI Aladdin, IBM 34GXP) Message-ID: <200001052040.MAA32766@freefall.freebsd.org>
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The following reply was made to PR kern/15923; it has been noted by GNATS. From: Soren Schmidt <sos@freebsd.dk> To: timlee@netcom.com Cc: freebsd-gnats-submit@FreeBSD.ORG Subject: Re: kern/15923: ATA/EIDE DMA does not work with some hardware (ALI Aladdin, IBM 34GXP) Date: Wed, 5 Jan 2000 21:39:04 +0100 (CET) It seems timlee@netcom.com wrote: > The above combination gives DMA errors when used with a kernel > whose ATA DMA is turned on (controller wdc0 ... flags 0xa0ffa0ff). > With ATA DMA turned off (controller wdc0 ... flags 0x80ff80ff), no > problems. Errors do not cause crashes or damage, but slow down the > system and cause numerous messages to be printed on the console. > NetBSD 1.4.1 has a similar problem. Linux kernel 2.2.13 with the > "experimental" Acer ATA DMA driver does not have this problem. > >How-To-Repeat: > Use a kernel with ATA DMA turned on with the listed combination of > hardware (probably motherboard/chipset and disk are the key pieces). > >Fix: > GENERIC kernels should keep ATA DMA off as they are now. Turning > the feature on in the GENERIC kernel (as NetBSD 1.4.1 does) can make > installing and initial configuration difficult on some combinations > of hardware. A true fix may require looking into some Acer chipset > specific issues as Linux 2.2 does. Have you tried the new ATA driver in 4.0 current ?? -Søren To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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