From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265766AbUEZSYw (ORCPT ); Wed, 26 May 2004 14:24:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265767AbUEZSYw (ORCPT ); Wed, 26 May 2004 14:24:52 -0400 Received: from colin2.muc.de ([193.149.48.15]:30483 "HELO colin2.muc.de") by vger.kernel.org with SMTP id S265766AbUEZSYv (ORCPT ); Wed, 26 May 2004 14:24:51 -0400 Date: 26 May 2004 20:24:50 +0200 Date: Wed, 26 May 2004 20:24:50 +0200 From: Andi Kleen To: hch@infradead.org, Andi Kleen , Ingo Molnar , andrea@suse.de, linux-kernel@vger.kernel.org, arjanv@redhat.com Subject: Re: 4k stacks in 2.6 Message-ID: <20040526182450.GA16219@colin2.muc.de> References: <1ZQpn-1Rx-1@gated-at.bofh.it> <1ZQz8-1Yh-15@gated-at.bofh.it> <1ZRFf-2Vt-3@gated-at.bofh.it> <203Zu-4aT-15@gated-at.bofh.it> <20040526181734.GA30093@infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20040526181734.GA30093@infradead.org> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, May 26, 2004 at 02:17:34PM -0400, hch@infradead.org wrote: > On Wed, May 26, 2004 at 03:57:05PM +0200, Andi Kleen wrote: > > Ingo Molnar writes: > > > > > > do you realize that the 4K stacks feature also adds a separate softirq > > > and a separate hardirq stack? So the maximum footprint is 4K+4K+4K, with > > > > A nice combination would be 8K process stacks with separate irq stacks on > > i386. > > > > Any chance the CONFIGs for those two could be split? > > Any reason not to enable interrupt stacks unconditionally and leave > the stack size choice to the user? It will probably still break some other patches, like debuggers. Given that the kernel is supposed to be stable I would not change it unconditionally in 2.6. Maybe in 2.7. -Andi