Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757718Ab0KOOxS (ORCPT ); Mon, 15 Nov 2010 09:53:18 -0500 Received: from bedivere.hansenpartnership.com ([66.63.167.143]:39977 "EHLO bedivere.hansenpartnership.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757641Ab0KOOxR (ORCPT ); Mon, 15 Nov 2010 09:53:17 -0500 Subject: Re: SCSI TMF processing; tag allocation From: James Bottomley To: Alan Cox Cc: Jens Axboe , Matthew Wilcox , Luben Tuikov , Greg KH , "linux-scsi@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "tj@kernel.org" In-Reply-To: <20101115144029.5c322b78@lxorguk.ukuu.org.uk> References: <380694.87733.qm@web31812.mail.mud.yahoo.com> <20101113123750.GF18258@parisc-linux.org> <4CE0FD24.4030000@fusionio.com> <1289831595.2233.5.camel@mulgrave.site> <20101115144029.5c322b78@lxorguk.ukuu.org.uk> Content-Type: text/plain; charset="UTF-8" Date: Mon, 15 Nov 2010 08:53:14 -0600 Message-ID: <1289832794.2233.8.camel@mulgrave.site> Mime-Version: 1.0 X-Mailer: Evolution 2.30.1.2 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 743 Lines: 20 On Mon, 2010-11-15 at 14:40 +0000, Alan Cox wrote: > > Realistically, tag starvation isn't really a problem. It was a known > > issue for 80s era hardware. I've got some of the oldest drives on the > > planet and I didn't see a problem when the clock algorithm was removed > > from 53c700. > > I'm not entirely sure that is the case at least for some early NCQ > capable ATA drives 8( OK, since ATA seems to be reinventing all sorts of bad 80s SCSI behaviour, I'll concede this point. James -- 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/