From owner-freebsd-smp  Fri Jun 29 22:47:55 2001
Delivered-To: freebsd-smp@freebsd.org
Received: from a.mx.everquick.net (a.mx.everquick.net [216.89.137.3])
	by hub.freebsd.org (Postfix) with ESMTP
	id F325C37B405; Fri, 29 Jun 2001 22:47:50 -0700 (PDT)
	(envelope-from eddy+public+spam@noc.everquick.net)
Received: from localhost (eddy@localhost)
	by a.mx.everquick.net (8.10.2/8.10.2) with ESMTP id f5U5lnV19618;
	Sat, 30 Jun 2001 05:47:49 GMT
X-EverQuick-No-Abuse: Report any e-mail abuse to <abuse@noc.everquick.net>
Date: Sat, 30 Jun 2001 05:47:49 +0000 (GMT)
From: "E.B. Dreger" <eddy+public+spam@noc.everquick.net>
To: freebsd-smp@freebsd.org, freebsd-hackers@freebsd.org
Subject: Quick question: AIO / SMP / process-based threading
Message-ID: <Pine.LNX.4.20.0106300538250.19544-100000@www.everquick.net>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Sender: owner-freebsd-smp@FreeBSD.ORG
Precedence: bulk
List-ID: <freebsd-smp.FreeBSD.ORG>
List-Archive: <http://docs.freebsd.org/mail/> (Web Archive)
List-Help: <mailto:majordomo?subject=help> (List Instructions)
List-Subscribe: <mailto:majordomo?subject=subscribe%20freebsd-smp>
List-Unsubscribe: <mailto:majordomo?subject=unsubscribe%20freebsd-smp>
X-Loop: FreeBSD.org

Quick question(s):

1. Is AIO SMP-safe?

2. If not, how could one force coherency?  (Read and rewrite locked
   a word from each cache line?)  Is it worth the effort, or should
   one not use AIO across process boundaries?

I'm asking primarily about 4.x, unless anyone has good guesses of
how 5.x will be. ;-)

I'll also keep an eye out for KSEs... thanks to Terry and others
for alerting me to those.  (KSEs really answer most of my recent
questions, but I don't think that I can wait that long, nor do I
have the kernel background to really offer any assistance in the
KSE project...)


TIA,
Eddy

---------------------------------------------------------------------------

Brotsman & Dreger, Inc.
EverQuick Internet Division

Phone: +1 (316) 794-8922 Wichita/(Inter)national
Phone: +1 (785) 865-5885 Lawrence

---------------------------------------------------------------------------

Date: Mon, 21 May 2001 11:23:58 +0000 (GMT)
From: A Trap <blacklist@brics.com>
To: blacklist@brics.com
Subject: Please ignore this portion of my mail signature.

These last few lines are a trap for address-harvesting spambots.  Do NOT
send mail to <blacklist@brics.com>, or you are likely to be blocked.


To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-smp" in the body of the message