From owner-cvs-all  Thu Mar 22  7:40:12 2001
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From: Soren Schmidt <sos@freebsd.dk>
Message-Id: <200103221540.QAA67077@freebsd.dk>
Subject: Re: cvs commit: src/etc MAKEDEV
In-Reply-To: <Pine.NEB.3.96L.1010322102513.10372A-100000@fledge.watson.org> from Robert Watson at "Mar 22, 2001 10:30:42 am"
To: rwatson@FreeBSD.org (Robert Watson)
Date: Thu, 22 Mar 2001 16:40:05 +0100 (CET)
Cc: nyan@FreeBSD.org (Takahashi Yoshihiro), sos@FreeBSD.org,
	jkh@FreeBSD.org, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
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It seems Robert Watson wrote:
> 1) It may be that we need a seperate "MAKEDEV all" for each architecture
> 
> 2) Someone :-) needs to fix ATA to provide the support you need for PC98,
>    as I keep being assured that WD is marching towards destruction.

Well, not much I can do here due to lack of that platform, but I'll 
be gald to help, however I havn't heard anything about this from the
PC98 gang...

> It's useful to note that the primary source of problems with AD that I
> have observed is overly agressive use of DMA instead of PIO for devices
> that don't support it.  I wonder if that's something we could be doing
> better?

This has been solved in -current, as the ata driver now check the
ata.ata_dma tunable for wether or not DMA should be used, ie it
is settable from the loader before the system boot, its then
later settable with atacontrol pr device.
It would have benn so much easier if devices told the real deal
on wether they support DMA or not...

-Søren

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