From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S269673AbUHZWQz (ORCPT ); Thu, 26 Aug 2004 18:16:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S269677AbUHZWPj (ORCPT ); Thu, 26 Aug 2004 18:15:39 -0400 Received: from mail1.kontent.de ([81.88.34.36]:44444 "EHLO Mail1.KONTENT.De") by vger.kernel.org with ESMTP id S269673AbUHZWCp (ORCPT ); Thu, 26 Aug 2004 18:02:45 -0400 From: Oliver Neukum To: "Zephaniah E. Hull" Subject: Re: PF_MEMALLOC in 2.6 Date: Fri, 27 Aug 2004 00:04:15 +0200 User-Agent: KMail/1.6.2 Cc: Nick Piggin , Hugh Dickins , Pete Zaitcev , arjanv@redhat.com, alan@redhat.com, greg@kroah.com, linux-kernel@vger.kernel.org, riel@redhat.com, sct@redhat.com References: <200408201052.51178.oliver@neukum.org> <20040826211642.GA30866@babylon.d2dc.net> In-Reply-To: <20040826211642.GA30866@babylon.d2dc.net> MIME-Version: 1.0 Content-Disposition: inline Content-Type: text/plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Message-Id: <200408270004.16534.oliver@neukum.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > > Storage cannot do concurrent IO. > > I'm going to jump in here and ask a simple question, what is the > blocking point that stops writes happening concurrent with reads? The protocol on USB allows one command at a time only. Regards Oliver