From owner-freebsd-current Thu Sep 24 14:49:09 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id OAA21849 for freebsd-current-outgoing; Thu, 24 Sep 1998 14:49:09 -0700 (PDT) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from nomis.simon-shapiro.org (nomis.simon-shapiro.org [209.86.126.163]) by hub.freebsd.org (8.8.8/8.8.8) with SMTP id OAA21817 for ; Thu, 24 Sep 1998 14:48:50 -0700 (PDT) (envelope-from shimon@simon-shapiro.org) Received: (qmail 12747 invoked by uid 1000); 24 Sep 1998 22:52:41 -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: <19980924213043.19742@follo.net> Date: Thu, 24 Sep 1998 18:52:41 -0400 (EDT) X-Face: (&r=uR0&yvh>h^ZL4"-TH61PD}/|Y'~58Z# Gz&BK'&uLAf:2wLb~L7YcWfau{;N(#LR2)\i.l8'ZqVhv~$rNx$]Om6Sv36S'\~5m/U'"i/L)&t$R0&?,)tm0l5xZ!\hZU^yMyCdt!KTcQ376cCkQ^Q_n.GH;Dd-q+ O51^+.K-1Kq?WsP9;cw-Ki+b.iY-5@3!YB5{I$h;E][Xlg*sPO61^5=:5k)JdGet,M|$"lq!1!j_>? $0Yc? Reply-To: shimon@simon-shapiro.org Organization: The Simon Shapiro Foundation From: Simon Shapiro To: Eivind Eklund Subject: Re: options DPT_LOST_IRQ Cc: Adam McDougall , current@FreeBSD.ORG, "Justin T.Gibbs" Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Eivind Eklund, On 24-Sep-98 you wrote: > On Thu, Sep 24, 1998 at 12:30:29PM -0600, Justin T. Gibbs wrote: > > >This option is necessary due to interrupts being eaten by the serial > > >driver 'fast interrupt' code (which in some cases blocks interrupts > > >longer than the DPT assert them). > > > > Wow. I thought that the fast interrupt code could only cause > > interrupts > > to be deferred, never eaten. Did anyone ever talk to Bruce about this? > > I didn't, at least, as I don't have the relevant equipment to > reproduce the fault, and didn't learn about it until a month and a > half ago, when somebody else (outside the FreeBSD camp proper) was > already working on fixing that code. However, I believe that project > has been abandoned for the time being. There are (according to my > source - I don't have SMP and don't know the issues) a bunch of > problems related to interrupts and SMP. > > I don't know if the DPT_LOST_IRQ problem only occur on SMP - Adam, do > you have SMP? Happens on SMP, even without serial port activity. On Nomis, we get it about once an hour. > > I'd hate to have a situation where lots of drivers each have their own > > little timeout handler to deal with this problem. > > I absolutely agree. However, no matter what, it is better for the DPT > to work (with that kind of kludge) than for it to die. > > Eivind. > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-current" in the body of the message Sincerely Yours, Shimon@Simon-Shapiro.ORG 770.265.7340 Simon Shapiro Unwritten code has no bugs and executes at twice the speed of mouth To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message