From patchwork Thu Nov 7 14:32:05 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shile Zhang X-Patchwork-Id: 11233045 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 09C45139A for ; Thu, 7 Nov 2019 14:33:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E74CA2187F for ; Thu, 7 Nov 2019 14:33:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389263AbfKGOdB (ORCPT ); Thu, 7 Nov 2019 09:33:01 -0500 Received: from out30-45.freemail.mail.aliyun.com ([115.124.30.45]:60222 "EHLO out30-45.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389190AbfKGOdB (ORCPT ); Thu, 7 Nov 2019 09:33:01 -0500 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R211e4;CH=green;DM=||false|;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e07487;MF=shile.zhang@linux.alibaba.com;NM=1;PH=DS;RN=11;SR=0;TI=SMTPD_---0ThQoCKT_1573137161; Received: from e18g09479.et15sqa.tbsite.net(mailfrom:shile.zhang@linux.alibaba.com fp:SMTPD_---0ThQoCKT_1573137161) by smtp.aliyun-inc.com(127.0.0.1); Thu, 07 Nov 2019 22:32:58 +0800 From: shile.zhang@linux.alibaba.com To: Masahiro Yamada , Michal Marek , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Josh Poimboeuf , x86@kernel.org Cc: "H . Peter Anvin" , linux-kernel@vger.kernel.org, linux-kbuild@vger.kernel.org, Shile Zhang Subject: [RFC PATCH 4/4] x86/Kconfig: Add a Kconfig option to sort ORC tables at build time Date: Thu, 7 Nov 2019 22:32:05 +0800 Message-Id: <20191107143205.206606-5-shile.zhang@linux.alibaba.com> X-Mailer: git-send-email 2.24.0.rc2 In-Reply-To: <20191107143205.206606-1-shile.zhang@linux.alibaba.com> References: <20191107143205.206606-1-shile.zhang@linux.alibaba.com> MIME-Version: 1.0 Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org From: Shile Zhang Add a new Kconfig BUILDTIME_ORCTABLE_SORT to control the ORC unwind tables at build time. Select for ORC unwinder on x86_64 by default. Signed-off-by: Shile Zhang --- arch/x86/Kconfig.debug | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug index bf9cd83de777..320ff2af4837 100644 --- a/arch/x86/Kconfig.debug +++ b/arch/x86/Kconfig.debug @@ -335,6 +335,15 @@ config UNWINDER_GUESS endchoice +config BUILDTIME_ORCTABLE_SORT + bool "Sort ORC unwind tables at build time" + depends on X86_64 + depends on UNWINDER_ORC + default y + help + This option enables the build-time sorting for ORC unwind tables. It + can help to speed up kernel boot by skip the runtime sorting. + config FRAME_POINTER depends on !UNWINDER_ORC && !UNWINDER_GUESS bool