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=-12.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,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 2D1C3C433E2 for ; Wed, 16 Sep 2020 00:44:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DA97C2076B for ; Wed, 16 Sep 2020 00:44:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=bytedance-com.20150623.gappssmtp.com header.i=@bytedance-com.20150623.gappssmtp.com header.b="rKQ26Puo" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726658AbgIPAo1 (ORCPT ); Tue, 15 Sep 2020 20:44:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48698 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726281AbgIONBS (ORCPT ); Tue, 15 Sep 2020 09:01:18 -0400 Received: from mail-pf1-x442.google.com (mail-pf1-x442.google.com [IPv6:2607:f8b0:4864:20::442]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 87DD8C061355 for ; Tue, 15 Sep 2020 06:01:17 -0700 (PDT) Received: by mail-pf1-x442.google.com with SMTP id n14so1888942pff.6 for ; Tue, 15 Sep 2020 06:01:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=5ZrW0owKm5Gu/md3j3csp/5vC7YMmkDgEblXZgaxGvk=; b=rKQ26Puop/3DC0nrZnzSaunkjQvxjCcWAFcRgsiFlS5oDPySzDrGYBOFscTRKZ4YlM HaZkWdGc00lfINkpTlQMky/65NALAje0ARqIxEgH8YHLW7y7qMzJoRrKyRVuYSbP/nf+ XH+MsNGqG3VKJTq7YO2bdVXuP1ZxSlHHxR7GFhsEItGdJemBjAS1la5HsrJ/eZvvGPT+ uMOO4JsqFuKv6FtCD0c5rWItP6VMCkdTcNiPG/pDcH2K7Gwv8fleIR1REqxGU8d0hvRN zVLvYD5ThV6VB1WeSJIJx6TUdr4YJgoVoF3sNLFaVYR08jBnTX5fXC9FmrD2eOTInsFw GDrg== 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=5ZrW0owKm5Gu/md3j3csp/5vC7YMmkDgEblXZgaxGvk=; b=he3vZ48qAVzzKkIiit73RQlgsL4SOLFlT5TAdcXi1VqCMgYKJkHJOdy5U1EOJjzppd 0b6Gs1zq5eQh3Wk68y5rfynMvFy9+zQm4KGQpraA2l1oq6Uq8I+5xDeYETUHm3QvO0o0 ZFrz28u43xnZHzm2ihuNB1U0JZplsLU7x8e7kr1r1FRNCXFxJF8ox/SFRCFF2wzIrJD/ K4VsruTDe633kAAfsXWxUTEz+dTfXZq1xvShh9qTMuxLLYwQGg6XFt53qT0Jh1vFtcSe s4ZD6hdPOrarbiQ/o1MT1Q1ycqLzRC/yVdukrQHiFy2eESbtMoTEtNNez4hgPMijSPIM DX9A== X-Gm-Message-State: AOAM532dJa97sWZbBH8ytIL6U5VERshp7LQtvvQtduQPe3m297ZO3Vfx EdxaOKqFDI3bXMtrQZeQezi+BQ== X-Google-Smtp-Source: ABdhPJw36/tEPEk+vlzhPHIn06m+FQnqNgd2oPnWDmzY+7j8re+39DQktUux3tDDjqBaTAXQu8D/0A== X-Received: by 2002:a63:1226:: with SMTP id h38mr14256662pgl.196.1600174876644; Tue, 15 Sep 2020 06:01:16 -0700 (PDT) Received: from localhost.bytedance.net ([103.136.220.66]) by smtp.gmail.com with ESMTPSA id w185sm14269855pfc.36.2020.09.15.06.01.07 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 15 Sep 2020 06:01:15 -0700 (PDT) From: Muchun Song To: corbet@lwn.net, mike.kravetz@oracle.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, viro@zeniv.linux.org.uk, akpm@linux-foundation.org, paulmck@kernel.org, mchehab+huawei@kernel.org, pawan.kumar.gupta@linux.intel.com, rdunlap@infradead.org, oneukum@suse.com, anshuman.khandual@arm.com, jroedel@suse.de, almasrymina@google.com, rientjes@google.com Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, Muchun Song Subject: [RFC PATCH 07/24] mm/hugetlb: Add freeing unused vmemmap pages support for x86 Date: Tue, 15 Sep 2020 20:59:30 +0800 Message-Id: <20200915125947.26204-8-songmuchun@bytedance.com> X-Mailer: git-send-email 2.21.0 (Apple Git-122) In-Reply-To: <20200915125947.26204-1-songmuchun@bytedance.com> References: <20200915125947.26204-1-songmuchun@bytedance.com> 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 On x86_64 architecture, we use hupe page mapping vmemmap area. We should define VMEMMAP_HPAGE_SHIFT to the correct value to support freeing unused vmemmap pages. Signed-off-by: Muchun Song --- arch/x86/include/asm/hugetlb.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/x86/include/asm/hugetlb.h b/arch/x86/include/asm/hugetlb.h index 1721b1aadeb1..f5e882f999cd 100644 --- a/arch/x86/include/asm/hugetlb.h +++ b/arch/x86/include/asm/hugetlb.h @@ -5,6 +5,11 @@ #include #include +#ifdef CONFIG_HUGETLB_PAGE_FREE_VMEMMAP +#define VMEMMAP_HPAGE_SHIFT PMD_SHIFT +#define arch_vmemmap_support_huge_mapping() boot_cpu_has(X86_FEATURE_PSE) +#endif + #define hugepages_supported() boot_cpu_has(X86_FEATURE_PSE) #endif /* _ASM_X86_HUGETLB_H */ -- 2.20.1