Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262408AbUKVWXP (ORCPT ); Mon, 22 Nov 2004 17:23:15 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262440AbUKVWXN (ORCPT ); Mon, 22 Nov 2004 17:23:13 -0500 Received: from fw.osdl.org ([65.172.181.6]:3466 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id S262438AbUKVWWz (ORCPT ); Mon, 22 Nov 2004 17:22:55 -0500 Date: Mon, 22 Nov 2004 14:22:30 -0800 (PST) From: Linus Torvalds To: Christoph Lameter cc: Hugh Dickins , akpm@osdl.org, Benjamin Herrenschmidt , Nick Piggin , linux-mm@kvack.org, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: deferred rss update instead of sloppy rss In-Reply-To: Message-ID: References: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 754 Lines: 22 On Mon, 22 Nov 2004, Christoph Lameter wrote: > > The problem is then that the proc filesystem must do an extensive scan > over all threads to find users of a certain mm_struct. The alternative is to just add a simple list into the task_struct and the head of it into mm_struct. Then, at fork, you just finish the fork() with list_add(p->mm_list, p->mm->thread_list); and do the proper list_del() in exit_mm() or wherever. You'll still loop in /proc, but you'll do the minimal loop necessary. Linus - 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/