From mboxrd@z Thu Jan 1 00:00:00 1970 From: joe@perches.com (Joe Perches) Date: Tue, 18 Oct 2011 17:31:41 -0700 Subject: [PATCH 0/3] ARM 4Kstacks: introduction In-Reply-To: <4E9E1944.80601@am.sony.com> References: <4E9E0B71.9020708@am.sony.com> <1318983248.7569.5.camel@Joe-Laptop> <4E9E1944.80601@am.sony.com> Message-ID: <1318984301.7569.9.camel@Joe-Laptop> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Tue, 2011-10-18 at 17:26 -0700, Tim Bird wrote: > On 10/18/2011 05:14 PM, Joe Perches wrote: > > On Tue, 2011-10-18 at 16:27 -0700, Tim Bird wrote: > >> I'm about to submit a set of patches (really pretty small) > >> to add 4K stack support to ARM (defaulted to 'N'). > > When 4k stacks went away, I thought it safe enough > > to submit vsnprintf recursion using %pV. > Even inside Sony, usage of 4K stacks is limited > to some very special cases, where memory is exceedingly > tight (we have one system with 4M of RAM). And we > don't mind lopping off features or coding around > problem areas to support our special case. I believe CONFIG_PRINTK=n assures no %pV problem. From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751590Ab1JSAbm (ORCPT ); Tue, 18 Oct 2011 20:31:42 -0400 Received: from perches-mx.perches.com ([206.117.179.246]:34621 "EHLO labridge.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751043Ab1JSAbl (ORCPT ); Tue, 18 Oct 2011 20:31:41 -0400 Message-ID: <1318984301.7569.9.camel@Joe-Laptop> Subject: Re: [PATCH 0/3] ARM 4Kstacks: introduction From: Joe Perches To: Tim Bird Cc: Russell King , "linux-arm-kernel@lists.infradead.org" , Arnd Bergmann , Andi Kleen , Thomas Gleixner , linux kernel Date: Tue, 18 Oct 2011 17:31:41 -0700 In-Reply-To: <4E9E1944.80601@am.sony.com> References: <4E9E0B71.9020708@am.sony.com> <1318983248.7569.5.camel@Joe-Laptop> <4E9E1944.80601@am.sony.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.0- Content-Transfer-Encoding: 7bit Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 2011-10-18 at 17:26 -0700, Tim Bird wrote: > On 10/18/2011 05:14 PM, Joe Perches wrote: > > On Tue, 2011-10-18 at 16:27 -0700, Tim Bird wrote: > >> I'm about to submit a set of patches (really pretty small) > >> to add 4K stack support to ARM (defaulted to 'N'). > > When 4k stacks went away, I thought it safe enough > > to submit vsnprintf recursion using %pV. > Even inside Sony, usage of 4K stacks is limited > to some very special cases, where memory is exceedingly > tight (we have one system with 4M of RAM). And we > don't mind lopping off features or coding around > problem areas to support our special case. I believe CONFIG_PRINTK=n assures no %pV problem.