From owner-freebsd-hackers Fri Jun 25 22:56:33 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from www0i.netaddress.usa.net (www0i.netaddress.usa.net [204.68.24.38]) by hub.freebsd.org (Postfix) with SMTP id E090814FEC for ; Fri, 25 Jun 1999 22:56:30 -0700 (PDT) (envelope-from jesus.monroy@usa.net) Received: (qmail 6979 invoked by uid 60001); 26 Jun 1999 05:56:29 -0000 Message-ID: <19990626055629.6978.qmail@www0i.netaddress.usa.net> Received: from 204.68.24.38 by www0i via web-mailer(M3.2.0.17) on Sat Jun 26 05:56:29 GMT 1999 Date: 25 Jun 99 22:56:29 PDT From: Jesus Monroy To: Ville-Pertti Keinonen Subject: Re: [Re: coarse vs fine-grained locking in SMP systems] Cc: hackers@freebsd.org X-Mailer: USANET web-mailer (M3.2.0.17) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Ville-Pertti Keinonen wrote: > mo@servo.ccr.org (Mike O'Dell) writes: > > we published the best Unix SMP paper I've ever seen in Computing > > Systems - from the Amdahl guys who did an SMP version of the kernel > > by very clever hacks on SPLx() macros to make them spin locks and > > a bit of other clever trickery on the source. they could take a stoc= k > = > An approach like that can't possibly be sufficient if code has been > written with the assumption that only interrupt-like events or > blocking calls can change things from under it. There is quite a bit > of code in FreeBSD that relies on this. > = Can you elaborate on this a bit more? I think I missing some of the finer points on what you are saying. I work on interrupt driven device drivers and I'm trying to see how this ties in. --- "I'd rather pay for my freedom than live in a bitmapped, = pop-up-happy dungeon like NT." http://www.performancecomputing.com/features/9809of1.shtml ____________________________________________________________________ Get free e-mail and a permanent address at http://www.netaddress.com/?N=3D= 1 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message