From patchwork Thu Dec 9 15:09:38 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Woodhouse X-Patchwork-Id: 12666725 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 CE656C433EF for ; Thu, 9 Dec 2021 15:10:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239566AbhLIPNz (ORCPT ); Thu, 9 Dec 2021 10:13:55 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43048 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239421AbhLIPNs (ORCPT ); Thu, 9 Dec 2021 10:13:48 -0500 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DB86FC061353; Thu, 9 Dec 2021 07:10:14 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description; bh=M/YYv3gr+rHTtVoXKv5llOdH/rGmFevtrCyuCrq7vAs=; b=Jhzb3PUgrXAVUpMifP7+BRtt2Y +lusRk/YTrgZJNJO1l0FPtVCpUieCqUhYfHjFYLw/Jy1RQsYj89ncBV9BjwRMZq9KdZBjIZHO0c5Q 1cqcc0331lqBOit04D5XAC6WvR33SYTf+iUm9TJcqZLh1VIsdfvz+cA2HaDjgkxfeS0uJL/3e5Grw hurRnyoXnyPg/VSB3gYDguraYjN4B7n2qGbiypUCKwCzNLdf7Hb9E3b4J0DmU+yJkO2MNVMRVOu9G kigGIN6afMmaLFmicMdEFh0/GYTLwgr61oDgF+lt+gtegEk7z0xhMnctcAGQcR9pars9azznVNqgJ 4X+a9mIA==; Received: from i7.infradead.org ([2001:8b0:10b:1:21e:67ff:fecb:7a92]) by desiato.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1mvL3K-000Np4-H4; Thu, 09 Dec 2021 15:09:46 +0000 Received: from dwoodhou by i7.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1mvL3K-0000yw-6f; Thu, 09 Dec 2021 15:09:46 +0000 From: David Woodhouse To: Thomas Gleixner Cc: Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Paolo Bonzini , "Paul E. McKenney" , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, rcu@vger.kernel.org, mimoja@mimoja.de, hewenliang4@huawei.com, hushiyuan@huawei.com, luolongjun@huawei.com, hejingxian@huawei.com Subject: [PATCH 11/11] x86/kvm: Silence per-cpu pr_info noise about KVM clocks and steal time Date: Thu, 9 Dec 2021 15:09:38 +0000 Message-Id: <20211209150938.3518-12-dwmw2@infradead.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211209150938.3518-1-dwmw2@infradead.org> References: <20211209150938.3518-1-dwmw2@infradead.org> MIME-Version: 1.0 Sender: David Woodhouse X-SRS-Rewrite: SMTP reverse-path rewritten from by desiato.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: David Woodhouse I made the actual CPU bringup go nice and fast... and then Linux spends half a minute printing stupid nonsense about clocks and steal time for each of 256 vCPUs. Don't do that. Nobody cares. Signed-off-by: David Woodhouse --- arch/x86/kernel/kvm.c | 6 +++--- arch/x86/kernel/kvmclock.c | 2 +- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c index 59abbdad7729..a438217cbfac 100644 --- a/arch/x86/kernel/kvm.c +++ b/arch/x86/kernel/kvm.c @@ -313,7 +313,7 @@ static void kvm_register_steal_time(void) return; wrmsrl(MSR_KVM_STEAL_TIME, (slow_virt_to_phys(st) | KVM_MSR_ENABLED)); - pr_info("stealtime: cpu %d, msr %llx\n", cpu, + pr_debug("stealtime: cpu %d, msr %llx\n", cpu, (unsigned long long) slow_virt_to_phys(st)); } @@ -350,7 +350,7 @@ static void kvm_guest_cpu_init(void) wrmsrl(MSR_KVM_ASYNC_PF_EN, pa); __this_cpu_write(apf_reason.enabled, 1); - pr_info("setup async PF for cpu %d\n", smp_processor_id()); + pr_debug("setup async PF for cpu %d\n", smp_processor_id()); } if (kvm_para_has_feature(KVM_FEATURE_PV_EOI)) { @@ -376,7 +376,7 @@ static void kvm_pv_disable_apf(void) wrmsrl(MSR_KVM_ASYNC_PF_EN, 0); __this_cpu_write(apf_reason.enabled, 0); - pr_info("disable async PF for cpu %d\n", smp_processor_id()); + pr_debug("disable async PF for cpu %d\n", smp_processor_id()); } static void kvm_disable_steal_time(void) diff --git a/arch/x86/kernel/kvmclock.c b/arch/x86/kernel/kvmclock.c index 462dd8e9b03d..a35cbf9107af 100644 --- a/arch/x86/kernel/kvmclock.c +++ b/arch/x86/kernel/kvmclock.c @@ -174,7 +174,7 @@ static void kvm_register_clock(char *txt) pa = slow_virt_to_phys(&src->pvti) | 0x01ULL; wrmsrl(msr_kvm_system_time, pa); - pr_info("kvm-clock: cpu %d, msr %llx, %s", smp_processor_id(), pa, txt); + pr_debug("kvm-clock: cpu %d, msr %llx, %s", smp_processor_id(), pa, txt); } static void kvm_save_sched_clock_state(void)