Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755304AbYHMPXb (ORCPT ); Wed, 13 Aug 2008 11:23:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752202AbYHMPXX (ORCPT ); Wed, 13 Aug 2008 11:23:23 -0400 Received: from mx1.redhat.com ([66.187.233.31]:45254 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752155AbYHMPXX (ORCPT ); Wed, 13 Aug 2008 11:23:23 -0400 Message-ID: <48A2FC17.9070302@redhat.com> Date: Wed, 13 Aug 2008 08:21:59 -0700 From: Ulrich Drepper Organization: Red Hat, Inc. User-Agent: Thunderbird 2.0.0.16 (X11/20080723) MIME-Version: 1.0 To: Ingo Molnar CC: Arjan van de Ven , akpm@linux-foundation.org, hugh@veritas.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, briangrant@google.com, cgd@google.com, mbligh@google.com, Linus Torvalds , Thomas Gleixner , "H. Peter Anvin" Subject: Re: pthread_create() slow for many threads; also time to revisit 64b context switch optimization? References: <20080813104445.GA24632@elte.hu> <20080813063533.444c650d@infradead.org> <48A2EE07.3040003@redhat.com> <20080813142529.GB21129@elte.hu> <48A2F157.7000303@redhat.com> <20080813151007.GA8780@elte.hu> In-Reply-To: <20080813151007.GA8780@elte.hu> X-Enigmail-Version: 0.95.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1087 Lines: 28 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Ingo Molnar wrote: > i find it pretty unacceptable these days that we limit any aspect of > pure 64-bit apps in any way to 4GB (or any other 32-bit-ish limit). Sure, but if we can pin-point the sub-archs for which it is the problem then a flag to optionally request it is even easier to handle. You'd simply ignore the flag for anything but the P4 architecture. I personally have no problem removing the whole thing because I have no such machine running anymore. But there are people out there who have. - -- ➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iEYEARECAAYFAkii/BcACgkQ2ijCOnn/RHQ8FACfZFV+WaBmS6UNqZZ/xDfV/Z7z gIAAoJSmbauchdaIVIebz8N2rPrszAMF =WAzJ -----END PGP SIGNATURE----- -- 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/