Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756194AbYFCGyh (ORCPT ); Tue, 3 Jun 2008 02:54:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753298AbYFCGyN (ORCPT ); Tue, 3 Jun 2008 02:54:13 -0400 Received: from ozlabs.org ([203.10.76.45]:44673 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752511AbYFCGyL (ORCPT ); Tue, 3 Jun 2008 02:54:11 -0400 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <18500.59345.230174.727316@cargo.ozlabs.ibm.com> Date: Tue, 3 Jun 2008 16:42:25 +1000 From: Paul Mackerras To: "Pekka Enberg" Cc: "FUJITA Tomonori" , linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, akpm@linux-foundation.org Subject: Re: [PATCH -mm] clean up duplicated alloc/free_thread_info In-Reply-To: <84144f020806022306h236a48cbv32b82cfa83fe4ee6@mail.gmail.com> References: <20080603140620S.fujita.tomonori@lab.ntt.co.jp> <84144f020806022306h236a48cbv32b82cfa83fe4ee6@mail.gmail.com> X-Mailer: VM 7.19 under Emacs 22.1.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 604 Lines: 16 Pekka Enberg writes: > Yeah, I too have wondered why some architectures use kmalloc() whereas > others use the page allocator. Is THREAD_SIZE significantly smaller > than PAGE_SIZE for those? 64-bit powerpc uses 16k kernel stacks and either 4k or 64k page size. If the page size is 64k then we don't want to allocate a whole page for a kernel stack. Paul. -- 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/