Message ID | 789d8a9a23887c20e4966b6e1c9b52a320ab87af.1607332046.git.yuleixzhang@tencent.com (mailing list archive) |
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State | New, archived |
Headers | show
Return-Path: <linux-fsdevel-owner@kernel.org> 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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 E75BAC1B087 for <linux-fsdevel@archiver.kernel.org>; Mon, 7 Dec 2020 11:38:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B44BB233CE for <linux-fsdevel@archiver.kernel.org>; Mon, 7 Dec 2020 11:38:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727162AbgLGLfL (ORCPT <rfc822;linux-fsdevel@archiver.kernel.org>); Mon, 7 Dec 2020 06:35:11 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40936 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727149AbgLGLfK (ORCPT <rfc822;linux-fsdevel@vger.kernel.org>); Mon, 7 Dec 2020 06:35:10 -0500 Received: from mail-pf1-x432.google.com (mail-pf1-x432.google.com [IPv6:2607:f8b0:4864:20::432]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 51896C061A52; Mon, 7 Dec 2020 03:34:30 -0800 (PST) Received: by mail-pf1-x432.google.com with SMTP id i3so6028315pfd.6; Mon, 07 Dec 2020 03:34:30 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=V0y+XXlhGalJMcAfPtOZoEyFt4J5WODB5ittFdj4EUc=; b=rWRkAEepoZ2AAXIS01SYEF9ocTxtc5cj/PFyxRiP37W7nq7Baq7lKLqQ1sovJAs//a d1zGmvUF7iz+BGuUZQV/x3/OWgGxZ4E7wXvRZkhRUY/MccWgFzrVjp+JaxSQpMhgj3S/ ETYvw6meqsHRfGqjL0+qIm9fYduavZsTZkx11ljgBhgD+PZktQFe4FiX8UwISy1teSLt x10aQxM2etDIKPUlcc+xzqN2U3igNRSiFUiFiZ7DWpXSC1epub1tWNPs1sKaUeVMftWu g19anHRd+XMhMmIs4xMVQKHWUmqjfinlCw5B+IgBh6gxXvlvHMT+PYd+rjI2vYOikyBZ Ym4w== 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=V0y+XXlhGalJMcAfPtOZoEyFt4J5WODB5ittFdj4EUc=; b=GKK+wFsRmHek6h+RycX/otK+WdB76cfnGkG372DdTy+YEYKIgQbkCd29t3CqoDS6Zd 932OrL8Nx/XSyva+XgRX4K5BQQtfUnByUHy/XjeSE5tpfePUf7v/a8ntrv4Min0UayyZ Px7NN9vN2gu1Yc8e8l3f/+rJZcclW9OrwgbdoduJ0W4KcEe7a+4rewqTeKzGn0RILlDt NWDwqCYrg4qYEGfv/xn3ESYhtMzBJV9k3lC4xBbXIMxFq+Gw1Bp3z/1BZwCbsTBULSGw JaZHPCn7L6EYZimhbELOn+dpKu1FHcgeRhK6ERNyJ5JBXEtQzBu2MhYSOsDyh4a0tedr /Q6Q== X-Gm-Message-State: AOAM530L63VBVTDXFrKO6//CNceOqU8nyQ4RKbU3H/54DpGV90I9Jk2S Ins1dPf8+9nDOOaqYUanNL0= X-Google-Smtp-Source: ABdhPJxxb4HMiIpDPIafiIQODWbFpWWDR0MIcugLliMblGl9ynQK2cghFVJD2Y7Luh2Xq+P1vMYFgw== X-Received: by 2002:a63:a551:: with SMTP id r17mr2997461pgu.13.1607340869896; Mon, 07 Dec 2020 03:34:29 -0800 (PST) Received: from localhost.localdomain ([203.205.141.39]) by smtp.gmail.com with ESMTPSA id d4sm14219822pfo.127.2020.12.07.03.34.26 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 07 Dec 2020 03:34:29 -0800 (PST) From: yulei.kernel@gmail.com X-Google-Original-From: yuleixzhang@tencent.com To: linux-mm@kvack.org, akpm@linux-foundation.org, linux-fsdevel@vger.kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, naoya.horiguchi@nec.com, viro@zeniv.linux.org.uk, pbonzini@redhat.com Cc: joao.m.martins@oracle.com, rdunlap@infradead.org, sean.j.christopherson@intel.com, xiaoguangrong.eric@gmail.com, kernellwp@gmail.com, lihaiwei.kernel@gmail.com, Yulei Zhang <yuleixzhang@tencent.com>, Chen Zhuo <sagazchen@tencent.com> Subject: [RFC V2 15/37] mm: add pmd_special() check for pmd_trans_huge_lock() Date: Mon, 7 Dec 2020 19:31:08 +0800 Message-Id: <789d8a9a23887c20e4966b6e1c9b52a320ab87af.1607332046.git.yuleixzhang@tencent.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <cover.1607332046.git.yuleixzhang@tencent.com> References: <cover.1607332046.git.yuleixzhang@tencent.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: <linux-fsdevel.vger.kernel.org> X-Mailing-List: linux-fsdevel@vger.kernel.org |
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Enhance memory utilization with DMEMFS
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expand
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diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h index 0365aa9..2514b90 100644 --- a/include/linux/huge_mm.h +++ b/include/linux/huge_mm.h @@ -242,7 +242,8 @@ static inline int is_swap_pmd(pmd_t pmd) static inline spinlock_t *pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma) { - if (is_swap_pmd(*pmd) || pmd_trans_huge(*pmd) || pmd_devmap(*pmd)) + if (is_swap_pmd(*pmd) || pmd_trans_huge(*pmd) + || pmd_devmap(*pmd) || pmd_special(*pmd)) return __pmd_trans_huge_lock(pmd, vma); else return NULL; diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 9474dbc..31f9e83 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1890,7 +1890,7 @@ spinlock_t *__pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma) spinlock_t *ptl; ptl = pmd_lock(vma->vm_mm, pmd); if (likely(is_swap_pmd(*pmd) || pmd_trans_huge(*pmd) || - pmd_devmap(*pmd))) + pmd_devmap(*pmd) || pmd_special(*pmd))) return ptl; spin_unlock(ptl); return NULL;