From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?ISO-8859-1?Q?P=E1draig_Brady?= Subject: Re: [PATCH 8/9] readahead: basic support for backwards prefetching Date: Tue, 29 Nov 2011 16:37:55 +0000 Message-ID: <4ED50A63.1010805@draigBrady.com> References: <20111129130900.628549879@intel.com> <20111129131456.925952168@intel.com> <20111129153552.GP5635@quack.suse.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: Wu Fengguang , Andrew Morton , Andi Kleen , Li Shaohua , Linux Memory Management List , linux-fsdevel@vger.kernel.org, LKML To: Jan Kara Return-path: In-Reply-To: <20111129153552.GP5635@quack.suse.cz> Sender: owner-linux-mm@kvack.org List-Id: linux-fsdevel.vger.kernel.org On 11/29/2011 03:35 PM, Jan Kara wrote: > Someone already mentioned this earlier and I don't think I've seen a > response: Do you have a realistic usecase for this? I don't think I've = ever > seen an application reading file backwards... tac, tail -n$large, ... cheers, P=E1draig. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter= .ca/ Don't email: email@kvack.org From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail143.messagelabs.com (mail143.messagelabs.com [216.82.254.35]) by kanga.kvack.org (Postfix) with SMTP id 340F66B0055 for ; Tue, 29 Nov 2011 11:38:02 -0500 (EST) Message-ID: <4ED50A63.1010805@draigBrady.com> Date: Tue, 29 Nov 2011 16:37:55 +0000 From: =?ISO-8859-1?Q?P=E1draig_Brady?= MIME-Version: 1.0 Subject: Re: [PATCH 8/9] readahead: basic support for backwards prefetching References: <20111129130900.628549879@intel.com> <20111129131456.925952168@intel.com> <20111129153552.GP5635@quack.suse.cz> In-Reply-To: <20111129153552.GP5635@quack.suse.cz> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Sender: owner-linux-mm@kvack.org List-ID: To: Jan Kara Cc: Wu Fengguang , Andrew Morton , Andi Kleen , Li Shaohua , Linux Memory Management List , linux-fsdevel@vger.kernel.org, LKML On 11/29/2011 03:35 PM, Jan Kara wrote: > Someone already mentioned this earlier and I don't think I've seen a > response: Do you have a realistic usecase for this? I don't think I've ever > seen an application reading file backwards... tac, tail -n$large, ... cheers, Padraig. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756020Ab1K2Qh7 (ORCPT ); Tue, 29 Nov 2011 11:37:59 -0500 Received: from mail2.vodafone.ie ([213.233.128.44]:58566 "EHLO mail2.vodafone.ie" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755955Ab1K2Qh6 (ORCPT ); Tue, 29 Nov 2011 11:37:58 -0500 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AqMBAN0J1U5tTdZN/2dsb2JhbAAMN6hXhRoBAQEEMgFGEAsNAQoJFg8JAwIBAgFFBg0BBwEBv0yLHgSaOYws Message-ID: <4ED50A63.1010805@draigBrady.com> Date: Tue, 29 Nov 2011 16:37:55 +0000 From: =?ISO-8859-1?Q?P=E1draig_Brady?= User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:6.0) Gecko/20110816 Thunderbird/6.0 MIME-Version: 1.0 To: Jan Kara CC: Wu Fengguang , Andrew Morton , Andi Kleen , Li Shaohua , Linux Memory Management List , linux-fsdevel@vger.kernel.org, LKML Subject: Re: [PATCH 8/9] readahead: basic support for backwards prefetching References: <20111129130900.628549879@intel.com> <20111129131456.925952168@intel.com> <20111129153552.GP5635@quack.suse.cz> In-Reply-To: <20111129153552.GP5635@quack.suse.cz> X-Enigmail-Version: 1.3.2 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11/29/2011 03:35 PM, Jan Kara wrote: > Someone already mentioned this earlier and I don't think I've seen a > response: Do you have a realistic usecase for this? I don't think I've ever > seen an application reading file backwards... tac, tail -n$large, ... cheers, Pádraig.