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=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,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 0A3CACA9EAF for ; Thu, 24 Oct 2019 13:31:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D234E20663 for ; Thu, 24 Oct 2019 13:31:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2393608AbfJXNbj (ORCPT ); Thu, 24 Oct 2019 09:31:39 -0400 Received: from foss.arm.com ([217.140.110.172]:51516 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388827AbfJXNbj (ORCPT ); Thu, 24 Oct 2019 09:31:39 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 17A06C8F; Thu, 24 Oct 2019 06:31:24 -0700 (PDT) Received: from e112269-lin.cambridge.arm.com (e112269-lin.cambridge.arm.com [10.1.194.43]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id D2C493F71A; Thu, 24 Oct 2019 06:31:22 -0700 (PDT) From: Steven Price To: Marc Zyngier Cc: catalin.marinas@arm.com, kernel-janitors@vger.kernel.org, Mao Wenan , linux-kernel@vger.kernel.org, will@kernel.org, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, Steven Price Subject: [PATCH v2] KVM: arm64: Select TASK_DELAY_ACCT+TASKSTATS rather than SCHEDSTATS Date: Thu, 24 Oct 2019 14:31:11 +0100 Message-Id: <20191024133111.27758-1-steven.price@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <3abfc893613caf529b0f6a933e74068d@www.loen.fr> References: <3abfc893613caf529b0f6a933e74068d@www.loen.fr> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org SCHEDSTATS requires DEBUG_KERNEL (and PROC_FS) and therefore isn't a good choice for enabling the scheduling statistics required for stolen time. Instead match the x86 configuration and select TASK_DELAY_ACCT and TASKSTATS. This adds the dependencies of NET && MULTIUSER for arm64 KVM. Suggested-by: Marc Zyngier Fixes: 8564d6372a7d ("KVM: arm64: Support stolen time reporting via shared structure") Signed-off-by: Steven Price --- Let's try again! Somehow I'd got it into my head that TASK_DELAY_ACCT selected TASKSTATS not depended on. Even though I'd managed to get it right in the comment! arch/arm64/kvm/Kconfig | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kvm/Kconfig b/arch/arm64/kvm/Kconfig index d8b88e40d223..a475c68cbfec 100644 --- a/arch/arm64/kvm/Kconfig +++ b/arch/arm64/kvm/Kconfig @@ -21,6 +21,8 @@ if VIRTUALIZATION config KVM bool "Kernel-based Virtual Machine (KVM) support" depends on OF + # for TASKSTATS/TASK_DELAY_ACCT: + depends on NET && MULTIUSER select MMU_NOTIFIER select PREEMPT_NOTIFIERS select HAVE_KVM_CPU_RELAX_INTERCEPT @@ -39,7 +41,8 @@ config KVM select IRQ_BYPASS_MANAGER select HAVE_KVM_IRQ_BYPASS select HAVE_KVM_VCPU_RUN_PID_CHANGE - select SCHEDSTATS + select TASKSTATS + select TASK_DELAY_ACCT ---help--- Support hosting virtualized guest machines. We don't support KVM with 16K page tables yet, due to the multiple -- 2.20.1