Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 26 Nov 2001 13:04:31 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 26 Nov 2001 13:04:12 -0500 Received: from pizda.ninka.net ([216.101.162.242]:17280 "EHLO pizda.ninka.net") by vger.kernel.org with ESMTP id ; Mon, 26 Nov 2001 13:04:00 -0500 Date: Mon, 26 Nov 2001 10:02:17 -0800 (PST) Message-Id: <20011126.100217.112611573.davem@redhat.com> To: mingo@elte.hu Cc: velco@fadata.bg, linux-kernel@vger.kernel.org Subject: Re: [PATCH] Scalable page cache From: "David S. Miller" In-Reply-To: In-Reply-To: <87elml4ssx.fsf@fadata.bg> X-Mailer: Mew version 2.0 on Emacs 21.0 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org From: Ingo Molnar Date: Mon, 26 Nov 2001 18:22:25 +0100 (CET) The problem with the tree is that if we have a big, eg. 16 GB pagecache, then even assuming a perfectly balanced tree, it takes more than 20 iterations to find the page in the tree. His tree is per-inode, so you'd need a fully in ram 16GB _FILE_ to get the bad tree search properties you describe. I like his patch, a lot. - 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/