From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail138.messagelabs.com (mail138.messagelabs.com [216.82.249.35]) by kanga.kvack.org (Postfix) with SMTP id C9C7E6B0069 for ; Mon, 21 Nov 2011 18:33:11 -0500 (EST) Date: Mon, 21 Nov 2011 15:33:09 -0800 From: Andrew Morton Subject: Re: [PATCH 7/8] readahead: basic support for backwards prefetching Message-Id: <20111121153309.d2a410fb.akpm@linux-foundation.org> In-Reply-To: <20111121093846.887841399@intel.com> References: <20111121091819.394895091@intel.com> <20111121093846.887841399@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Wu Fengguang Cc: Linux Memory Management List , linux-fsdevel@vger.kernel.org, Andi Kleen , Li Shaohua , LKML On Mon, 21 Nov 2011 17:18:26 +0800 Wu Fengguang wrote: > Add the backwards prefetching feature. It's pretty simple if we don't > support async prefetching and interleaved reads. Well OK, but I wonder how many applications out there read files in reverse order. Is it common enough to bother special-casing in the kernel like this? -- 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