From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: ata_std_qc_defer not good enough for FIS-based switching ? Date: Wed, 30 Apr 2008 18:38:18 +0900 Message-ID: <48183E0A.1070308@gmail.com> References: <48163C5D.9050605@rtr.ca> <48164AE8.4070106@rtr.ca> <481659B5.7090703@gmail.com> <48175664.5030702@rtr.ca> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from wa-out-1112.google.com ([209.85.146.181]:28208 "EHLO wa-out-1112.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759099AbYD3JiY (ORCPT ); Wed, 30 Apr 2008 05:38:24 -0400 Received: by wa-out-1112.google.com with SMTP id j37so215197waf.23 for ; Wed, 30 Apr 2008 02:38:24 -0700 (PDT) In-Reply-To: <48175664.5030702@rtr.ca> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Mark Lord Cc: Jeff Garzik , IDE/ATA development list , Alan Cox Mark Lord wrote: > For the first time ever, I can now *heavily* mix PIO commands > with NCQ/non-NCQ DMA commands, to drives on an attached PM > (well, two attached PMs even), and the thing doesn't croak. > Woo-hoo! Cool. > Time to batch up some patches for Jeff. But sadly, just in time > to have missed his weekly visit to linux-ide. :) > > I wonder if something like that is what bit sata_sil24 the other day > when I had it plugged in, mixing DMA, NCQ, and PIO commands to drives > on an attached PM? sil24 and ahci are pretty heavily tested regarding command scheduling. I'll dig into the log soon. Please give me some time. Thanks. -- tejun