From patchwork Mon Sep 26 09:02:29 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 12988388 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5A8C6C6FA82 for ; Mon, 26 Sep 2022 09:04:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234612AbiIZJD6 (ORCPT ); Mon, 26 Sep 2022 05:03:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33776 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234821AbiIZJDx (ORCPT ); Mon, 26 Sep 2022 05:03:53 -0400 Received: from conuserg-10.nifty.com (conuserg-10.nifty.com [210.131.2.77]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B86CA3DF28; Mon, 26 Sep 2022 02:03:49 -0700 (PDT) Received: from zoe.. (133-32-182-133.west.xps.vectant.ne.jp [133.32.182.133]) (authenticated) by conuserg-10.nifty.com with ESMTP id 28Q92Yo2010468; Mon, 26 Sep 2022 18:02:37 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-10.nifty.com 28Q92Yo2010468 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1664182957; bh=A9rjJTx/1HLx31R8GgAjlfENvJtf39g+fxcn+LvStLM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GFBrPIGue3lq/+yk97SX0hd/1VanvBTKluhi+zk11JTgVnn8mbi9GDr4IkAlIcezO G0pCLT13UDNceCJzOicyOBcmTqXMKoANTtyfD2vJaSk4IY3KV3oIiXc1SHm+iHBMkA mLeuni+198HJ9I/6ijmdONog1/SzYJnpR2IDjQmfXbP8frLTmMnMlWjWg/foWnjkKK hFZ+idGqgH+rI3myVYbpZzN/LLu3zhL/qWlkLbzMshFFs1KEDHhRKu6fbYhQ079Efc /PAxD+PGrSAlgKaxYPa5jVfRR7HND7YqZN33H2uIpc/KpSzBALSLznvlQGA/mlcvra oabTs/wYtgkJA== X-Nifty-SrcIP: [133.32.182.133] From: Masahiro Yamada To: linux-kbuild@vger.kernel.org Cc: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, Masahiro Yamada , Michal Marek , Nick Desaulniers Subject: [PATCH 5/5] kallsyms: ignore __kstrtab_* and __kstrtabns_* symbols Date: Mon, 26 Sep 2022 18:02:29 +0900 Message-Id: <20220926090229.643134-5-masahiroy@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220926090229.643134-1-masahiroy@kernel.org> References: <20220926090229.643134-1-masahiroy@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org Every EXPORT_SYMBOL creates __kstrtab_* and __kstrtabns_*, which consumes 15-20% of the kallsyms entries. For x86_64 defconfig, $ cat /proc/kallsyms | wc 129527 388581 5685465 $ cat /proc/kallsyms | grep __kstrtab | wc 23489 70467 1187932 We already ignore __crc_* symbols populated by EXPORT_SYMBOL, so it should be fine to ignore __kstrtab_* and __kstrtabns_* as well. This makes vmlinux a bit smaller. $ size vmlinux.before vmlinux.after text data bss dec hex filename 22785374 8559694 1413328 32758396 1f3da7c vmlinux.before 22785374 8137806 1413328 32336508 1ed6a7c vmlinux.after Signed-off-by: Masahiro Yamada --- scripts/mksysmap | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/scripts/mksysmap b/scripts/mksysmap index 75f3dfd1c156..16a08b8ef2f8 100755 --- a/scripts/mksysmap +++ b/scripts/mksysmap @@ -43,6 +43,8 @@ # $ - local symbols for ARM, MIPS, etc. # .L - local labels, .LBB,.Ltmpxxx,.L__unnamed_xx,.LASANPC, etc. # __crc_ - modversions +# __kstrtab_ - EXPORT_SYMBOL (symbol name) +# __kstrtabns_ - EXPORT_SYMBOL (namespace) # # Ignored symbols: # L0 - for LoongArch? @@ -52,5 +54,7 @@ $NM -n $1 | grep -v \ -e ' \$' \ -e ' \.L' \ -e ' __crc_' \ + -e ' __kstrtab_' \ + -e ' __kstrtabns_' \ -e ' L0$' \ > $2