Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932147AbWHQAP3 (ORCPT ); Wed, 16 Aug 2006 20:15:29 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932148AbWHQAP3 (ORCPT ); Wed, 16 Aug 2006 20:15:29 -0400 Received: from smtp1.libero.it ([193.70.192.51]:43488 "EHLO smtp1.libero.it") by vger.kernel.org with ESMTP id S932147AbWHQAP2 convert rfc822-to-8bit (ORCPT ); Wed, 16 Aug 2006 20:15:28 -0400 From: "Giampaolo Tomassoni" To: "Linux Kernel ML" Subject: R: How to avoid serial port buffer overruns? Date: Thu, 17 Aug 2006 02:15:29 +0200 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.6604 (9.0.2911.0) In-Reply-To: <1155770899.8796.21.camel@mindpipe> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2962 Importance: Normal X-Scanned: with antispam and antivirus automated system at libero.it Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1061 Lines: 29 > OK, thanks. FWIW here is the serial board we are using: > > http://www.moschip.com/html/MCS9845.html > > The hardware guy says "The mn9845cv, have in default 2 serial ports and > one ISA bus, where we have connected the tl16c554, quad serial port." > > Hopefully Ingo's latency tracer can tell me what is holding off > interrupts. That may be an interrupt-sharing issue: quad port often use at most two irq lines and, FWIK, ISA irqs are edge-triggered, not level-triggered. Are you tring to use two MIDI ports at the same time? Giampaolo > > Lee > > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/