From patchwork Wed Mar 15 05:14:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 69977 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:5915:0:0:0:0:0 with SMTP id v21csp2151963wrd; Tue, 14 Mar 2023 22:43:04 -0700 (PDT) X-Google-Smtp-Source: AK7set+XQTqkEFf7YNJNWsojneI+pctFM7ymCZfQJrAj0XNyS2ES3bUn6n6PV5RKSzjqJmnlOFic X-Received: by 2002:a17:902:e1d1:b0:1a0:6a14:58d with SMTP id t17-20020a170902e1d100b001a06a14058dmr1116708pla.65.1678858984416; Tue, 14 Mar 2023 22:43:04 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1678858984; cv=none; d=google.com; s=arc-20160816; b=fmCbo9byusc7nsisSEZIwzlMjagBAe5p1OtTlhwjKMrblkXePnkZTZIC8oYQdUfKUT ToakiaRrNnDxwZeT1DTBtlAKT9CN3BywH3DyvL8J9myqqEeyvZTrZY4ULTkuqAmfqc1L ggO5r9BPcc+mkYvSyaF08qD4rogmNPDLGKGAutlWrhHkF9sNlgL8VPaAef6a2a6j9TEa J9I2jwimOii1yFBee2EOr2by95g4gzlijgODTNZzvVTTX/i0ZIqERUz0/9cfvwBfRh2y nXSngH8D9SYpidXtiTQzXg6nf9tn9YyKAYQdAMlqFdNDUfX9KQ1/ADiafa3AzfSEu0gZ 9pfQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=Qw0Yc4WVV1Zo/whVBkY4SGQKG5WI2G272Aisa/gvvD0=; b=llvkPxiPAxfNqSnFA7GpzkRW4k3VsSJynwfZBH/PKZF7fFKgD3MzUAFR+qGHSTTItV dBUCxaLK67gEfSAiAK1/cdbDAKDf4lt05lserT04zJbM/3YOz+gz3DcrJsYFPzfctQPZ QLzZkzgBbU/6Aqylo1uEtzsb4gXqZ1HdryUoCL1B02NeLjJ6eme7sHtEC5DAGGnT64dj tbhQIZQ7ZMjFhaeDfmcNpkx1T4ytpNW6Rdv8ECK79N8uubFyLuRBpPBIE/stqvLDGPi8 qmKYBnqhA8neMeeiGlEa4d0muASByrQcgwkMt6dOqJ82rG+uhPaIB3NOsgKFOFrGYJz4 1mHg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@infradead.org header.s=casper.20170209 header.b=S8RSPV+L; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id m1-20020a170902768100b0019cfc412deesi4091145pll.465.2023.03.14.22.42.49; Tue, 14 Mar 2023 22:43:04 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@infradead.org header.s=casper.20170209 header.b=S8RSPV+L; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231673AbjCOFRH (ORCPT + 99 others); Wed, 15 Mar 2023 01:17:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48688 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231384AbjCOFPV (ORCPT ); Wed, 15 Mar 2023 01:15:21 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D784F3B3D5; Tue, 14 Mar 2023 22:14:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=Qw0Yc4WVV1Zo/whVBkY4SGQKG5WI2G272Aisa/gvvD0=; b=S8RSPV+LjPHtyJ+ZmGK5RpjWsO x9RMGY+gK6PDYY8ah5J55iodIm8ajJ9dYMel7Bzxl0mHem3mk6/MyBwozsoPXmw/vg7mDV7Fcbk4m zcoB1S8IuxVNd1FylJEl3kWT6+26QRF0BEtLTgseAZVqrUVwUeFY3d8otRcJCL5gTtENArL4nzm59 6aH5mtUGvrKj3wUMHEEX9DkHcbUAttV07JpGgI7MtRsGuSCFWHqEUrIMsopV3MrUNu9axsQOALVo0 WAwGliINhd73W+rtpXo6yMbZFX1HB9yXcet4rCWEcArGnrTuopm70g434W9/f7XXHL+snwmJkgzOn T0hOfrfw==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1pcJTO-00DYE9-Qm; Wed, 15 Mar 2023 05:14:50 +0000 From: "Matthew Wilcox (Oracle)" To: linux-arch@vger.kernel.org Cc: Yin Fengwei , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Matthew Wilcox Subject: [PATCH v4 35/36] mm: Convert do_set_pte() to set_pte_range() Date: Wed, 15 Mar 2023 05:14:43 +0000 Message-Id: <20230315051444.3229621-36-willy@infradead.org> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20230315051444.3229621-1-willy@infradead.org> References: <20230315051444.3229621-1-willy@infradead.org> MIME-Version: 1.0 X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE, SPF_NONE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1760411238314498860?= X-GMAIL-MSGID: =?utf-8?q?1760411238314498860?= From: Yin Fengwei set_pte_range() allows to setup page table entries for a specific range. It takes advantage of batched rmap update for large folio. It now takes care of calling update_mmu_cache_range(). Signed-off-by: Yin Fengwei Signed-off-by: Matthew Wilcox (Oracle) --- Documentation/filesystems/locking.rst | 2 +- include/linux/mm.h | 3 ++- mm/filemap.c | 3 +-- mm/memory.c | 27 +++++++++++++++------------ 4 files changed, 19 insertions(+), 16 deletions(-) diff --git a/Documentation/filesystems/locking.rst b/Documentation/filesystems/locking.rst index 7de7a7272a5e..922886fefb7f 100644 --- a/Documentation/filesystems/locking.rst +++ b/Documentation/filesystems/locking.rst @@ -663,7 +663,7 @@ locked. The VM will unlock the page. Filesystem should find and map pages associated with offsets from "start_pgoff" till "end_pgoff". ->map_pages() is called with page table locked and must not block. If it's not possible to reach a page without blocking, -filesystem should skip it. Filesystem should use do_set_pte() to setup +filesystem should skip it. Filesystem should use set_pte_range() to setup page table entry. Pointer to entry associated with the page is passed in "pte" field in vm_fault structure. Pointers to entries for other offsets should be calculated relative to "pte". diff --git a/include/linux/mm.h b/include/linux/mm.h index ee755bb4e1c1..81788c985a8c 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1299,7 +1299,8 @@ static inline pte_t maybe_mkwrite(pte_t pte, struct vm_area_struct *vma) } vm_fault_t do_set_pmd(struct vm_fault *vmf, struct page *page); -void do_set_pte(struct vm_fault *vmf, struct page *page, unsigned long addr); +void set_pte_range(struct vm_fault *vmf, struct folio *folio, + struct page *page, unsigned int nr, unsigned long addr); vm_fault_t finish_fault(struct vm_fault *vmf); vm_fault_t finish_mkwrite_fault(struct vm_fault *vmf); diff --git a/mm/filemap.c b/mm/filemap.c index 6e2b0778db45..e2317623dcbf 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -3504,8 +3504,7 @@ static vm_fault_t filemap_map_folio_range(struct vm_fault *vmf, ret = VM_FAULT_NOPAGE; ref_count++; - do_set_pte(vmf, page, addr); - update_mmu_cache(vma, addr, vmf->pte); + set_pte_range(vmf, folio, page, 1, addr); } while (vmf->pte++, page++, addr += PAGE_SIZE, ++count < nr_pages); /* Restore the vmf->pte */ diff --git a/mm/memory.c b/mm/memory.c index 6aa21e8f3753..9a654802f104 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -4274,7 +4274,8 @@ vm_fault_t do_set_pmd(struct vm_fault *vmf, struct page *page) } #endif -void do_set_pte(struct vm_fault *vmf, struct page *page, unsigned long addr) +void set_pte_range(struct vm_fault *vmf, struct folio *folio, + struct page *page, unsigned int nr, unsigned long addr) { struct vm_area_struct *vma = vmf->vma; bool uffd_wp = vmf_orig_pte_uffd_wp(vmf); @@ -4282,7 +4283,7 @@ void do_set_pte(struct vm_fault *vmf, struct page *page, unsigned long addr) bool prefault = vmf->address != addr; pte_t entry; - flush_icache_page(vma, page); + flush_icache_pages(vma, page, nr); entry = mk_pte(page, vma->vm_page_prot); if (prefault && arch_wants_old_prefaulted_pte()) @@ -4296,14 +4297,18 @@ void do_set_pte(struct vm_fault *vmf, struct page *page, unsigned long addr) entry = pte_mkuffd_wp(entry); /* copy-on-write page */ if (write && !(vma->vm_flags & VM_SHARED)) { - inc_mm_counter(vma->vm_mm, MM_ANONPAGES); - page_add_new_anon_rmap(page, vma, addr); - lru_cache_add_inactive_or_unevictable(page, vma); + add_mm_counter(vma->vm_mm, MM_ANONPAGES, nr); + VM_BUG_ON_FOLIO(nr != 1, folio); + folio_add_new_anon_rmap(folio, vma, addr); + folio_add_lru_vma(folio, vma); } else { - inc_mm_counter(vma->vm_mm, mm_counter_file(page)); - page_add_file_rmap(page, vma, false); + add_mm_counter(vma->vm_mm, mm_counter_file(page), nr); + folio_add_file_rmap_range(folio, page, nr, vma, false); } - set_pte_at(vma->vm_mm, addr, vmf->pte, entry); + set_ptes(vma->vm_mm, addr, vmf->pte, entry, nr); + + /* no need to invalidate: a not-present page won't be cached */ + update_mmu_cache_range(vma, addr, vmf->pte, nr); } static bool vmf_pte_changed(struct vm_fault *vmf) @@ -4376,11 +4381,9 @@ vm_fault_t finish_fault(struct vm_fault *vmf) /* Re-check under ptl */ if (likely(!vmf_pte_changed(vmf))) { - do_set_pte(vmf, page, vmf->address); - - /* no need to invalidate: a not-present page won't be cached */ - update_mmu_cache(vma, vmf->address, vmf->pte); + struct folio *folio = page_folio(page); + set_pte_range(vmf, folio, page, 1, vmf->address); ret = 0; } else { update_mmu_tlb(vma, vmf->address, vmf->pte);