From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262726AbTJJJIc (ORCPT ); Fri, 10 Oct 2003 05:08:32 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262708AbTJJJIc (ORCPT ); Fri, 10 Oct 2003 05:08:32 -0400 Received: from holomorphy.com ([66.224.33.161]:3457 "EHLO holomorphy") by vger.kernel.org with ESMTP id S262726AbTJJJI3 (ORCPT ); Fri, 10 Oct 2003 05:08:29 -0400 Date: Fri, 10 Oct 2003 02:11:34 -0700 From: William Lee Irwin III To: "Frederick, Fabian" Cc: "Linux-Kernel (E-mail)" Subject: Re: [2.7 "thoughts"] V0.3 Message-ID: <20031010091134.GA682@holomorphy.com> Mail-Followup-To: William Lee Irwin III , "Frederick, Fabian" , "Linux-Kernel (E-mail)" References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Organization: The Domain of Holomorphy User-Agent: Mutt/1.5.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Oct 10, 2003 at 09:54:12AM +0200, Frederick, Fabian wrote: > 2.7 "thoughts" > Thanks to Gabor, Stuart, Stephan and others > Don't hesitate to send me more or comment. Ugh, this is all crackpot wishlist gunk. How about some goodies backed with real working code, like: * O(1) proc_pid_statm() -- originally by bcrl for 2.4, fwd port maintained by wli * O(lg(n)) proc_pid_readdir()/proc_task_readdir() -- original O(1) proc_pid_readdir() by manfred, rewritten by -- wli to use rbtrees for O(lg(n)) seeks into the relevant -- lists (walking over empty buckets had overhead) * 4KB ia32 kernel stacks + irqstacks -- original by bcrl, fwd port maintained by dhansen for a -- substantial amount of time, now maintained by wli * ia32 leaf pagetable node cache -- wli * node-local per_cpu areas for ia32 NUMA -- wli * highpmd, analogue of highpte for pmd's -- wli. Gets pmd's on node-local mem on ia32 NUMA, and -- alleviates a lot of lowmem pressure under heavy -- multiprogramming levels on PAE. Some benchmarks of a patchset including these (and several other things) are at http://home.earthlink.net/~rwhron/kernel/wli.html, and some ports of the patch set are at ftp://ftp.kernel.org/people/wli/kernels/ Whatever fantasy may be worth, working code is worth a lot more. I'll refrain from mentioning prototype-quality patches I'm hacking on atm. -- wli