Re: kern/43569

[Antti Kantee <pooka%cs.hut.fi@localhost>]

The following reply was made to PR kern/43569; it has been noted by GNATS.

From: Antti Kantee <pooka%cs.hut.fi@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: kern/43569
Date: Mon, 5 Jul 2010 11:49:50 +0300

 When I've been in similar situations and have been unable to figure
 out what's wrong with DMA, I've compiled the kernel so that DMA is
 disabled for the cd.  The cd of course uses a lot more CPU that way,
 but at least you don't have to wait a long time for the initial access.
 You can do this by changing the cd line in the kernel config to the
 following:
 
        cd*     at atapibus? drive ? flags 0x0ffc
 
 Disclaimer: I didn't verify it works, so there might be a typo there.
 See comments in GENERIC for more info.
 
 I don't know what the normal user way of doing that is supposed to be,
 but since you appear to have your own kernel, you might as well give
 that a go as a workaround.