From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 21EBCC43444 for ; Wed, 26 Dec 2018 10:00:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F06C12171F for ; Wed, 26 Dec 2018 10:00:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726734AbeLZKAo (ORCPT ); Wed, 26 Dec 2018 05:00:44 -0500 Received: from mga09.intel.com ([134.134.136.24]:3425 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726115AbeLZKAn (ORCPT ); Wed, 26 Dec 2018 05:00:43 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga102.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 26 Dec 2018 02:00:43 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.56,400,1539673200"; d="scan'208";a="112107082" Received: from devel-ww.sh.intel.com ([10.239.48.119]) by fmsmga008.fm.intel.com with ESMTP; 26 Dec 2018 02:00:40 -0800 From: Wei Wang To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, pbonzini@redhat.com, ak@linux.intel.com, peterz@infradead.org Cc: kan.liang@intel.com, mingo@redhat.com, rkrcmar@redhat.com, like.xu@intel.com, wei.w.wang@intel.com, jannh@google.com, arei.gonglei@huawei.com Subject: [PATCH v4 01/10] perf/x86: fix the variable type of the LBR MSRs Date: Wed, 26 Dec 2018 17:25:29 +0800 Message-Id: <1545816338-1171-2-git-send-email-wei.w.wang@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1545816338-1171-1-git-send-email-wei.w.wang@intel.com> References: <1545816338-1171-1-git-send-email-wei.w.wang@intel.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The MSR variable type can be "unsigned int", which uses less memory than the longer unsigned long. The lbr nr won't be a negative number, so make it "unsigned int" as well. Suggested-by: Peter Zijlstra Signed-off-by: Wei Wang Cc: Peter Zijlstra Cc: Andi Kleen --- arch/x86/events/perf_event.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/events/perf_event.h b/arch/x86/events/perf_event.h index 78d7b70..1f78d85 100644 --- a/arch/x86/events/perf_event.h +++ b/arch/x86/events/perf_event.h @@ -619,8 +619,8 @@ struct x86_pmu { /* * Intel LBR */ - unsigned long lbr_tos, lbr_from, lbr_to; /* MSR base regs */ - int lbr_nr; /* hardware stack size */ + unsigned int lbr_tos, lbr_from, lbr_to, + lbr_nr; /* lbr stack and size */ u64 lbr_sel_mask; /* LBR_SELECT valid bits */ const int *lbr_sel_map; /* lbr_select mappings */ bool lbr_double_abort; /* duplicated lbr aborts */ -- 2.7.4