From owner-freebsd-current Fri Jun 5 23:09:43 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id XAA28924 for freebsd-current-outgoing; Fri, 5 Jun 1998 23:09:43 -0700 (PDT) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from sendero.simon-shapiro.org (sendero.simon-shapiro.org.142.69.207.in-addr.arpa [207.69.142.25] (may be forged)) by hub.freebsd.org (8.8.8/8.8.8) with SMTP id XAA28919 for ; Fri, 5 Jun 1998 23:09:39 -0700 (PDT) (envelope-from shimon@sendero.simon-shapiro.org) Received: (qmail 12781 invoked by uid 1000); 5 Jun 1998 20:04:50 -0000 Message-ID: X-Mailer: XFMail 1.3 [p0] on FreeBSD X-Priority: 3 (Normal) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8bit MIME-Version: 1.0 In-Reply-To: <19980605093349.K768@freebie.lemis.com> Date: Fri, 05 Jun 1998 16:04:50 -0400 (EDT) Reply-To: shimon@simon-shapiro.org Organization: The Simon Shapiro Foundation From: Simon Shapiro To: Greg Lehey Subject: Re: DPT driver fails and panics with Degraded Array Cc: Mike Smith , Bob Willcox , Karl Pielorz , tcobb , "freebsd-current@freebsd.org" , Michael Hancock Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On 05-Jun-98 Greg Lehey wrote: ... >> Actually, SMP interrupt service is slow enough that this probably never >> has >> a chance to show at all. > > No way. Murphy is particularly unforgiving when it comes to race > conditions in interrupt handlers. Have 50 interrupts a second from > two processors, and sooner or later you're going to hit it. Then my theory as to what causes it is useless :-) Still, SMP is the least sensitive (as in ``never seen here'') to this problem. As an aside, I cannot, under SMP get the same number of I/Os per second as UP. Is it a FreeBSD thing, or Simon/DPT thing? Simon --- Sincerely Yours, Simon Shapiro Shimon@Simon-Shapiro.ORG 770.265.7340 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message