From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Tobias Arp" Subject: Re: ST16C654 stoppes transmitting after a while Date: Fri, 20 Jul 2012 06:25:29 +0200 Message-ID: <20120720042529.19870@gmx.net> References: <20120717074355.80180@gmx.net> <20120717105229.17b578a5@pyramind.ukuu.org.uk> <20120717100521.219440@gmx.net> <20120717122140.075aa7ae@pyramind.ukuu.org.uk> <20120717113603.9830@gmx.net> <20120717173847.1c5b4863@pyramind.ukuu.org.uk> <20120718063704.130240@gmx.net> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Return-path: Received: from mailout-de.gmx.net ([213.165.64.23]:51983 "HELO mailout-de.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1750709Ab2GTEZd (ORCPT ); Fri, 20 Jul 2012 00:25:33 -0400 In-Reply-To: <20120718063704.130240@gmx.net> Sender: linux-serial-owner@vger.kernel.org List-Id: linux-serial@vger.kernel.org To: Tobias Arp , alan@lxorguk.ukuu.org.uk Cc: linux-serial@vger.kernel.org BTW: all interfaces work fine with our old kernel version 2.6.15. Tobias -------- Original-Nachricht -------- > Datum: Wed, 18 Jul 2012 08:37:04 +0200 > Von: "Tobias Arp" > An: Alan Cox > CC: linux-serial@vger.kernel.org > Betreff: Re: ST16C654 stoppes transmitting after a while > The serial links are all set up to 115200 baud. > > Dumping out the tty-struct when it hangs shows me this: > > magic: 0x5401 > name: ttyS0 > flags: 0x00000A00 > count: 1 > stopped: 0 > hw_stopped: 1 > flow_stopped: 0 > packet: 0 > low_latency: 0 > warned: 0 > ctrl_status: 0x00 > receive_room: 4095 > ... > > It is a little bit strange that always the null modem connection shows > this behaviour. May be it's because it has the highest data transfer rate (all > other connections are made by isdn modems / 1-channel isdn)? > > > > > -------- Original-Nachricht -------- > > Datum: Tue, 17 Jul 2012 17:38:47 +0100 > > Von: Alan Cox > > An: "Tobias Arp" > > CC: linux-serial@vger.kernel.org > > Betreff: Re: ST16C654 stoppes transmitting after a while > > > On Tue, 17 Jul 2012 13:36:03 +0200 > > "Tobias Arp" wrote: > > > > > This is a single core arm processor (Cirrus EP9315), could this race > > condition happen in this case? > > > > In theory, otoh it ought to be quite easy to test for. > > > > How fast are your links - would it be fair to characterise your > > environment as a fairly slow CPU handling a lot of fast serial links > > > > (just trying to understand what the likely places to look might be) > > > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-serial" > in > > the body of a message to majordomo@vger.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- > To unsubscribe from this list: send the line "unsubscribe linux-serial" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html