From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Mon, 22 Nov 2004 14:22:30 -0800 (PST) From: Linus Torvalds 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: owner-linux-mm@kvack.org Return-Path: 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 List-ID: 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, 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/ . Don't email: aart@kvack.org