Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S267478AbUIJPQo (ORCPT ); Fri, 10 Sep 2004 11:16:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267487AbUIJPQo (ORCPT ); Fri, 10 Sep 2004 11:16:44 -0400 Received: from mx1.redhat.com ([66.187.233.31]:10159 "EHLO mx1.redhat.com") by vger.kernel.org with ESMTP id S267478AbUIJPQJ (ORCPT ); Fri, 10 Sep 2004 11:16:09 -0400 Date: Fri, 10 Sep 2004 17:15:38 +0200 From: Arjan van de Ven To: Hugh Dickins Cc: "Martin J. Bligh" , Andrea Arcangeli , Alan Cox , Chris Wedgwood , LKML , Christoph Hellwig Subject: Re: [PATCH 1/3] Separate IRQ-stacks from 4K-stacks option Message-ID: <20040910151538.GA24434@devserv.devel.redhat.com> References: <593560000.1094826651@[10.10.2.4]> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="Q68bSM7Ycu6FN28Q" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1598 Lines: 47 --Q68bSM7Ycu6FN28Q Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Fri, Sep 10, 2004 at 04:07:21PM +0100, Hugh Dickins wrote: > On Fri, 10 Sep 2004, Martin J. Bligh wrote: > > > > I agree about killing anything but 4K stacks though - having the single > > page is very compelling - not only can we allocate it easier, but we can > > also use cache-hot pages from the hot list. > > I think we all agree that's a promising future, and a good discipline. > But I'm not the only one to doubt we're there yet. > > Chris's patch seems eminently sensible to me. Why should having separate > interrupt stack depend on whether you're configured for 4K or 8K stacks? because it gives people a reason to do sloppy coding. > Wasn't Andrea worried, a couple of months back, about nested interrupts > overflowing the 4K interrupt stack? I don't think so; interrupts seem to behave quite ok in this regard. What we should consider regardless is disable the nesting of irqs for performance reasons but that's an independent matter --Q68bSM7Ycu6FN28Q Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iD8DBQFBQcUZxULwo51rQBIRApKcAKCeYEWHGoAbCcbrWwpfDXHzch/4bACfbn7/ ic8vva+T0hN0C87P+MTbf4M= =ntVb -----END PGP SIGNATURE----- --Q68bSM7Ycu6FN28Q-- - 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/