Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S269213AbUIHXg7 (ORCPT ); Wed, 8 Sep 2004 19:36:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S269220AbUIHXg6 (ORCPT ); Wed, 8 Sep 2004 19:36:58 -0400 Received: from the-village.bc.nu ([81.2.110.252]:13993 "EHLO localhost.localdomain") by vger.kernel.org with ESMTP id S269218AbUIHXfJ (ORCPT ); Wed, 8 Sep 2004 19:35:09 -0400 Subject: Re: [patch] voluntary-preempt-2.6.9-rc1-bk4-R1 From: Alan Cox To: Mark_H_Johnson@raytheon.com Cc: Ingo Molnar , Lee Revell , Free Ekanayaka , Eric St-Laurent , Linux Kernel Mailing List , "K.R. Foley" , Felipe Alfaro Solana , Daniel Schmitt , "P.O. Gaillard" , nando@ccrma.stanford.edu, luke@audioslack.com, free78@tin.it In-Reply-To: References: Content-Type: text/plain Content-Transfer-Encoding: 7bit Message-Id: <1094682656.12371.28.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.6 (1.4.6-2) Date: Wed, 08 Sep 2004 23:31:08 +0100 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 834 Lines: 19 On Mer, 2004-09-08 at 21:33, Mark_H_Johnson@raytheon.com wrote: > >.... Please disable IDE DMA and see > >what happens (after hiding the PIO IDE codepath via > >touch_preempt_timing()). > > Not quite sure where to add touch_preempt_timing() calls - somewhere in the > loop in ide_outsl and ide_insl? [so we keep resetting the start /end > times?] If you haven't done hdparm -u1 that may be a reason you want to touch these. To defend against some very bad old h/w where a stall in the I/O stream to the disk causes corruption we disable IRQ's across the transfer in PIO mode by default. - 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/