From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754080AbaIHOq0 (ORCPT ); Mon, 8 Sep 2014 10:46:26 -0400 Received: from filter1.ibarracuda.nl ([83.247.7.10]:37297 "EHLO filter1.ibarracuda.nl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753147AbaIHOqW (ORCPT ); Mon, 8 Sep 2014 10:46:22 -0400 X-ASG-Debug-ID: 1410187579-0759e778ba15aa840002-xx1T2L X-Barracuda-Envelope-From: Frans.Klaver@xsens.com X-Barracuda-AUTH-User: xsenscom X-Barracuda-Apparent-Source-IP: 87.249.116.215 Date: Mon, 8 Sep 2014 16:46:18 +0200 From: Frans Klaver To: Sebastian Andrzej Siewior CC: , , Greg Kroah-Hartman , , , , Subject: Re: [PATCH v8 00/18] 8250-core based serial driver for OMAP + DMA Message-ID: <20140908144616.GA22315@ci00147.xsens-tech.local> X-ASG-Orig-Subj: Re: [PATCH v8 00/18] 8250-core based serial driver for OMAP + DMA References: <1409943773-7874-1-git-send-email-bigeasy@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Disposition: inline In-Reply-To: <1409943773-7874-1-git-send-email-bigeasy@linutronix.de> User-Agent: Mutt/1.5.23 (2014-03-12) X-Originating-IP: [172.16.11.160] X-Barracuda-Connect: rev-215.116.249.87.virtu.nl[87.249.116.215] X-Barracuda-Start-Time: 1410187579 X-Barracuda-Encrypted: AES128-SHA X-Barracuda-URL: http://filter1.ibarracuda.nl:8000/cgi-mod/mark.cgi X-Barracuda-BRTS-Status: 1 X-Barracuda-Spam-Score: 0.00 X-Barracuda-Spam-Status: No, SCORE=0.00 using per-user scores of TAG_LEVEL=1000.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=5.0 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.3.9283 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, On Fri, Sep 05, 2014 at 09:02:35PM +0200, Sebastian Andrzej Siewior wrote: > This is my complete queue fo the omap serial driver based on the 8250 core > code. I played with it on beagle bone, am335x-evm and dra7xx including DMA. > The runtime-pm pieces look now bug-compatible with the omap-serial driver. > Besides the runtime-om improvement I also fixed a few corner cases for the > TX-DMA problem. The DMA fixes (in edma and omap-dma) were dropped and the > problem has been in 8250-dma via patch #13. Thanks for the respin. I've just tested the series a bit. Here's some things I ran into. - Basic console use is better than the previous series. It behaves pretty much like the omap-serial implementation. - ncurses based applications (vi, less) don't play nice for me on the console with this series. less doesn't show me anything. vi doesn't return to console properly. - I seem seem to get stuck in a "serial8250: too much work for irq%d" loop somewhat reliably. We have a rather demanding application with typically somewhere between 600 and 1000 byte packets being sent at 240Hz (roughly somewhere between 1.5 and 2 Mb/s). We run at baudrate 3500k. I get into this "too much work" thing already when running at 300 bytes per packet. I hope this is of some use to you. I'll do more testing later. Thanks, Frans