Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750990AbbB1JQR (ORCPT ); Sat, 28 Feb 2015 04:16:17 -0500 Received: from mail-pd0-f176.google.com ([209.85.192.176]:41153 "EHLO mail-pd0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750820AbbB1JQL (ORCPT ); Sat, 28 Feb 2015 04:16:11 -0500 Date: Sat, 28 Feb 2015 01:15:52 -0800 From: Brian Norris To: Robert Jarzmik Cc: Ezequiel Garcia , David Woodhouse , Maxime Ripard , linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2] mtd: pxa3xx-nand: handle PIO in threaded interrupt Message-ID: <20150228091552.GA12966@brian-ubuntu> References: <1424457403-6669-1-git-send-email-robert.jarzmik@free.fr> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1424457403-6669-1-git-send-email-robert.jarzmik@free.fr> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 990 Lines: 24 On Fri, Feb 20, 2015 at 07:36:43PM +0100, Robert Jarzmik wrote: > Change the handling of the data stage in the driver : don't pump data in > the top-half interrupt, but rather schedule a thread for non dma cases. > > This will enable latencies in the data pumping, especially if delays are > required. Moreover platform shall be more reactive as other interrupts > can be served while pumping data. > > No throughput degradation was observed, at least on the zylonite > platform, while a slight degradation was being expected. > > Signed-off-by: Robert Jarzmik > Tested-by: Maxime Ripard > --- > Since v1: use IRQF_ONESHOT per Maxime's comment Pushed to l2-mtd.git. Thanks. Brian -- 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/