From owner-freebsd-hackers Wed Mar 22 09:48:52 1995 Return-Path: hackers-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id JAA10555 for hackers-outgoing; Wed, 22 Mar 1995 09:48:52 -0800 Received: from godzilla.zeta.org.au (godzilla.zeta.org.au [203.2.228.34]) by freefall.cdrom.com (8.6.10/8.6.6) with ESMTP id JAA10544 for ; Wed, 22 Mar 1995 09:48:44 -0800 Received: (from bde@localhost) by godzilla.zeta.org.au (8.6.9/8.6.9) id DAA20994; Thu, 23 Mar 1995 03:45:43 +1000 Date: Thu, 23 Mar 1995 03:45:43 +1000 From: Bruce Evans Message-Id: <199503221745.DAA20994@godzilla.zeta.org.au> To: bde@zeta.org.au, phk@ref.tfs.com Subject: Re: Why IDE is bad Cc: freebsd-hackers@freefall.cdrom.com, kuku@gilberto.physik.rwth-aachen.de Sender: hackers-owner@FreeBSD.org Precedence: bulk >> This might explain why my Intr time is so much lower than Poul's. >> I have only 16MB, and don't use option BOUNCE_BUFFERS. The bcopy() >> for bouncing is done in a call from biodone(). biodone() is called >> from the interrupt handler, at least for the wd driver. >Excuse moi! Why would we need bounce-buffers for wd.c when the IO >is done using "REP INSW" ?? We don't. We need to call biodone() for finishing i/o for all drivers, and I'm not 100% sure that it is called from the interrupt handler except for the wd driver. Bruce