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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CD091C04A68 for ; Thu, 28 Jul 2022 20:46:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233404AbiG1UqJ (ORCPT ); Thu, 28 Jul 2022 16:46:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46868 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232986AbiG1Upl (ORCPT ); Thu, 28 Jul 2022 16:45:41 -0400 Received: from mail-pl1-x630.google.com (mail-pl1-x630.google.com [IPv6:2607:f8b0:4864:20::630]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D136D3A49A for ; Thu, 28 Jul 2022 13:45:34 -0700 (PDT) Received: by mail-pl1-x630.google.com with SMTP id t2so2814295ply.2 for ; Thu, 28 Jul 2022 13:45:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references:reply-to :mime-version:content-transfer-encoding; bh=gfO26u2xpyVmEWxjONFXEHf40ylM6r3kRxMGtINMS28=; b=CqUpKZVcHUdGhidYMYjokkBi17q5SK18jd7MhWe5pwlpQrL2nQqeN19YTR0WYDAFbP CMXhllFoexuWnVPLj4OetWCIXeI9nvG6zUlojn7oUojsxyNpgy7iF7r1rfVjsYa0ze71 xnb7t4vhiEViH6GAuV16Z31aSTVXUb5Gw00YwzsqcVrbtgZvjF3zYtKzugy+OFOVYce+ XTYTpiiV5Uqu8E6hZ+/VnjofZ9wyy0blnM4F2o3or+2R2ISS15tzVuSyLZVzFLexsber PTxe/D7DN/AFX9JYEBisHhtlBriUSIZuluLk2DWot1+vXvb6yB/2/At1UPMkYKaOwcLm PJmQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:reply-to:mime-version:content-transfer-encoding; bh=gfO26u2xpyVmEWxjONFXEHf40ylM6r3kRxMGtINMS28=; b=rsbrXMRyv+3XHimQxr8lVsKB7iMOtZ4jcSmk2cfPoIlkz3U9RaN+j4DZCFv2ZalpLs 9jkAR5ZACTZFCxZm3j/Sm6ZIIHGdP0lqFzHlXY/WPcNb9f8CdRkyxsZL69hEnfpIARak xvepQcFNWoB+PlbrKCWSL1z4aZAeI7k1g0sSMV8hrCt8Ao5nz73YHVrR6jCkiWKtksXs 7BsFxW6lg+8HAdng7fiqx0Q3NQ+dv9cM/R8fUce1H+wmRxTSY6uFhJu9RQjXjKo1B3v8 TcWLwQHqqOLmW03QJCkUZlTAjaH4FUua2kAAE+b5LX/QEC9OR6yq9R0ke3tewy6nGnm4 9XEA== X-Gm-Message-State: ACgBeo3+5auZg/vkoVjZDVS6zHVNcdxoHWG5o/UqIPetTKUih+QHRaJG NAC95y+23ZgTBU8QTBDnVh0= X-Google-Smtp-Source: AA6agR65b9BvIPJJ2aIA34xLNFyBah7YuqJvpKELG7QwV25Vml1sxFR036NxwJ4Xi5LcGcZNJFfljw== X-Received: by 2002:a17:90a:17e1:b0:1f2:2ff2:6cae with SMTP id q88-20020a17090a17e100b001f22ff26caemr1175172pja.196.1659041134124; Thu, 28 Jul 2022 13:45:34 -0700 (PDT) Received: from KASONG-MB0.tencent.com ([114.254.3.190]) by smtp.gmail.com with ESMTPSA id 21-20020a170902c11500b0016c40f8cb58sm1787304pli.81.2022.07.28.13.45.32 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Thu, 28 Jul 2022 13:45:33 -0700 (PDT) From: Kairui Song To: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org, Andrew Morton , Kairui Song Subject: [RFC PATCH 7/7] x86_64/tlb, mm: enable cpumask optimzation for RSS cache Date: Fri, 29 Jul 2022 04:45:11 +0800 Message-Id: <20220728204511.56348-8-ryncsn@gmail.com> X-Mailer: git-send-email 2.35.2 In-Reply-To: <20220728204511.56348-1-ryncsn@gmail.com> References: <20220728204511.56348-1-ryncsn@gmail.com> Reply-To: Kairui Song MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Kairui Song Enable CONFIG_ARCH_PCP_RSS_USE_CPUMASK for x86_64, we do a RSS cache switch in switch_mm_irqs_off. On x86_64 this is the unified routine for switching a mm, so hook into this can make sure any dead mm will have their cache invalidated in time, and cpumask is synced with cache state. Signed-off-by: Kairui Song --- arch/x86/Kconfig | 1 + arch/x86/mm/tlb.c | 5 +++++ 2 files changed, 6 insertions(+) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 52a7f91527fe..15e2b29ba972 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -125,6 +125,7 @@ config X86 select ARCH_WANT_LD_ORPHAN_WARN select ARCH_WANTS_THP_SWAP if X86_64 select ARCH_HAS_PARANOID_L1D_FLUSH + select ARCH_PCP_RSS_USE_CPUMASK if X86_64 select BUILDTIME_TABLE_SORT select CLKEVT_I8253 select CLOCKSOURCE_VALIDATE_LAST_CYCLE diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c index d400b6d9d246..614865f94d85 100644 --- a/arch/x86/mm/tlb.c +++ b/arch/x86/mm/tlb.c @@ -597,6 +597,11 @@ void switch_mm_irqs_off(struct mm_struct *prev, struct mm_struct *next, */ cond_mitigation(tsk); + /* + * Flush RSS cache before clear up the bitmask + */ + switch_pcp_rss_cache_no_irq(next); + /* * Stop remote flushes for the previous mm. * Skip kernel threads; we never send init_mm TLB flushing IPIs, -- 2.35.2