Subject: Re: ahc and Semantics of the "COMPLETE" return code
To: None <bouyer@antioche.ibp.fr, gibbs@plutotech.com>
From: Matthew Jacob <mjacob@feral.com>
List: tech-kern
Date: 06/23/1997 21:37:37
>From tech-kern-owner-mjacob=feral.com@NetBSD.ORG Mon Jun 23 11:18:37 1997
>
>>Now, about this specific ahc error (and this is why I've put Justin in Cc:)
>>This error is quite reproductible, bus this sounds like a resources shortage
>>rather than a real error.
>
>No, it is a real error.  With 256 S/G segments, you can represent, worst
>case, a 1MB I/O.  Since the kernel can only generate up to 64k I/Os, this
>is a "can't happen" condition (we should only use 17 S/G segments max).

Unless, like NASA, you modify things to increase MAXPHYS to 1MB or better.