From patchwork Tue Aug 6 07:16:01 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Wang, Wei W" X-Patchwork-Id: 11078401 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7CAEF14DB for ; Tue, 6 Aug 2019 08:05:11 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6EBF8288A9 for ; Tue, 6 Aug 2019 08:05:11 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6302D28893; Tue, 6 Aug 2019 08:05:11 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id F244F286BC for ; Tue, 6 Aug 2019 08:05:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732259AbfHFIFD (ORCPT ); Tue, 6 Aug 2019 04:05:03 -0400 Received: from mga03.intel.com ([134.134.136.65]:5765 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728998AbfHFIFC (ORCPT ); Tue, 6 Aug 2019 04:05:02 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 06 Aug 2019 01:00:38 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,352,1559545200"; d="scan'208";a="373337277" Received: from devel-ww.sh.intel.com ([10.239.48.128]) by fmsmga005.fm.intel.com with ESMTP; 06 Aug 2019 01:00:35 -0700 From: Wei Wang To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, ak@linux.intel.com, peterz@infradead.org, pbonzini@redhat.com 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, jmattson@google.com Subject: [PATCH v8 01/14] perf/x86: fix the variable type of the lbr msrs Date: Tue, 6 Aug 2019 15:16:01 +0800 Message-Id: <1565075774-26671-2-git-send-email-wei.w.wang@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1565075774-26671-1-git-send-email-wei.w.wang@intel.com> References: <1565075774-26671-1-git-send-email-wei.w.wang@intel.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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. Cc: Peter Zijlstra Cc: Andi Kleen Suggested-by: Peter Zijlstra Signed-off-by: Wei Wang --- 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 8751008..27e4d32 100644 --- a/arch/x86/events/perf_event.h +++ b/arch/x86/events/perf_event.h @@ -660,8 +660,8 @@ 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 */