Subject: Re: ahc and Semantics of the "COMPLETE" return code
To: Justin T. Gibbs <firstname.lastname@example.org>
From: Manuel BOUYER <email@example.com>
Date: 06/24/1997 11:23:03
On Jun 23, Justin T. Gibbs wrote
> 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).
> FreeBSD saw a similar problem perhaps a year and a half ago and it was
> caused by a sign extension bug somewhere. You could ask phk@FreeBSD.org for
> details since he tracked down and fixed the bug.
Yes, but the adapter is supposed to be able to handle several I/Os
at the same time, isn't it ? could'nt it run out of S/G segments in this case ?
Manuel Bouyer, LIP6, Universite Paris VI. firstname.lastname@example.org