Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750934AbbEYQsX (ORCPT ); Mon, 25 May 2015 12:48:23 -0400 Received: from foss.arm.com ([217.140.101.70]:48107 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750765AbbEYQsV convert rfc822-to-8bit (ORCPT ); Mon, 25 May 2015 12:48:21 -0400 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8BIT From: Catalin Marinas Mime-Version: 1.0 (1.0) Subject: Re: [RFC PATCH 2/2] arm64: Implement vmalloc based thread_info allocator Date: Mon, 25 May 2015 19:47:15 +0300 Message-Id: References: <1432483340-23157-1-git-send-email-jungseoklee85@gmail.com> <5992243.NYDGjLH37z@wuerfel> Cc: Arnd Bergmann , Catalin Marinas , "barami97@gmail.com" , Will Deacon , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" , "linux-arm-kernel@lists.infradead.org" In-Reply-To: To: Jungseok Lee X-Mailer: iPhone Mail (12F70) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 674 Lines: 17 On 25 May 2015, at 13:01, Jungseok Lee wrote: >> Could the stack size be reduced to 8KB perhaps? > > I guess probably not. > > A commit, 845ad05e, says that 8KB is not enough to cover SpecWeb benchmark. We could go back to 8KB stacks if we implement support for separate IRQ stack on arm64. It's not too complicated, we would have to use SP0 for (kernel) threads and SP1 for IRQ handlers. Catalin-- 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/