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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, 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 64882C07E9E for ; Fri, 9 Jul 2021 04:37:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 521A561448 for ; Fri, 9 Jul 2021 04:37:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231237AbhGIEk1 (ORCPT ); Fri, 9 Jul 2021 00:40:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39480 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229576AbhGIEkZ (ORCPT ); Fri, 9 Jul 2021 00:40:25 -0400 Received: from mail-pj1-x102c.google.com (mail-pj1-x102c.google.com [IPv6:2607:f8b0:4864:20::102c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DC91BC061762 for ; Thu, 8 Jul 2021 21:37:41 -0700 (PDT) Received: by mail-pj1-x102c.google.com with SMTP id oj10-20020a17090b4d8ab0290172f77377ebso5401878pjb.0 for ; Thu, 08 Jul 2021 21:37:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=QP3/GYzOBKmilm7HuEJkuqubxHWg9l5vJdRHFzc5VNI=; b=RclDDj3+rehsUldw5TyhuwvHXTZwkgCQaCL0mXmrg3nr75emQHZsdQL/PMBpmd2FSB 1okB0a10syEhmCx3GptxPQ6XYeTuHpa4AESmoVEqtDp3+bLgb4ii01UctXQhRSyNL3s2 nQd9N40sCnQ4Tz9f+NrHySY4qVntzcKYSjVho= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=QP3/GYzOBKmilm7HuEJkuqubxHWg9l5vJdRHFzc5VNI=; b=R8R8QlkyPtqMOjfMf0an3NTkHVxIeGFLPskmiXK9oQ75lak1UoHWV4Ndzr0Mj54fIb L6ah47wdJUPL+mK/8Qa2z6niTbjXUEB350mU8h6toE5Medpe1vt8FIWuS/qIWbLtVNHM K9wR5qNOXP9v6pgohLMuo4RwWnesFgBP/9MM5iQwwc3nc2fByVhOWHqyJOfm3TmeGJyE ABimhm0Fja3fbH3pIjJXKXsvhRPhJJlfjDeLmufjuH5w5Xl3/y1A0nvKEmVf9x25GsA+ KkxFrGQ4FFG6SAsSeba9sxjAwYeXgCCxVaNTTZPPr8TaGbTGoV9s5Uh81R68n6WEpYP3 453g== X-Gm-Message-State: AOAM532n4Se+b+9x6oBSACXoYFKSoYQzfGnfvUbEqeYRXOaen1XjQvoU KXDEvbNabaOe2XEandlQWHDoXA== X-Google-Smtp-Source: ABdhPJw7ofI5jbueMZXenvbdrtCTJqUoJIWkbzb4yngHCY3TUfGWSBMgYm2T5M9G4xte0hL+XeYjmw== X-Received: by 2002:a17:902:bc47:b029:129:dd30:1c30 with SMTP id t7-20020a170902bc47b0290129dd301c30mr5497773plz.4.1625805461468; Thu, 08 Jul 2021 21:37:41 -0700 (PDT) Received: from senozhatsky.flets-east.jp ([2409:10:2e40:5100:a30d:fc4:7834:ee08]) by smtp.gmail.com with ESMTPSA id y4sm4420760pfa.14.2021.07.08.21.37.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 08 Jul 2021 21:37:41 -0700 (PDT) From: Sergey Senozhatsky To: Marc Zyngier , Will Deacon Cc: Suleiman Souhlal , Joel Fernandes , linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, Sergey Senozhatsky Subject: [PATCHv2 3/4] arm64: do not use dummy vcpu_is_preempted() Date: Fri, 9 Jul 2021 13:37:12 +0900 Message-Id: <20210709043713.887098-4-senozhatsky@chromium.org> X-Mailer: git-send-email 2.32.0.93.g670b81a890-goog In-Reply-To: <20210709043713.887098-1-senozhatsky@chromium.org> References: <20210709043713.887098-1-senozhatsky@chromium.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org vcpu_is_preempted() now can represent the actual state of the VCPU, so the scheduler can make better decisions when it picks the idle CPU to enqueue a task on. Signed-off-by: Sergey Senozhatsky --- arch/arm64/include/asm/spinlock.h | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/arch/arm64/include/asm/spinlock.h b/arch/arm64/include/asm/spinlock.h index 0525c0b089ed..1d579497e1b8 100644 --- a/arch/arm64/include/asm/spinlock.h +++ b/arch/arm64/include/asm/spinlock.h @@ -7,21 +7,23 @@ #include #include +#include /* See include/linux/spinlock.h */ #define smp_mb__after_spinlock() smp_mb() -/* - * Changing this will break osq_lock() thanks to the call inside - * smp_cond_load_relaxed(). - * - * See: - * https://lore.kernel.org/lkml/20200110100612.GC2827@hirez.programming.kicks-ass.net - */ #define vcpu_is_preempted vcpu_is_preempted -static inline bool vcpu_is_preempted(int cpu) + +#ifdef CONFIG_PARAVIRT +static inline bool vcpu_is_preempted(unsigned int cpu) +{ + return paravirt_vcpu_is_preempted(cpu); +} +#else +static inline bool vcpu_is_preempted(unsigned int cpu) { return false; } +#endif /* CONFIG_PARAVIRT */ #endif /* __ASM_SPINLOCK_H */ -- 2.32.0.93.g670b81a890-goog