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=-18.8 required=3.0 tests=BAYES_00,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=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 8F0B5C47E4B for ; Thu, 15 Jul 2021 04:34:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 78C3261360 for ; Thu, 15 Jul 2021 04:34:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237267AbhGOEhi (ORCPT ); Thu, 15 Jul 2021 00:37:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58136 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237147AbhGOEhh (ORCPT ); Thu, 15 Jul 2021 00:37:37 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8AC5EC061760; Wed, 14 Jul 2021 21:34:44 -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=q4HzUntlNBnpuwySZABxW5Hl5awpEdtX1/0gp7hxQgQ=; b=sPAg9ML4h3aKe1UDXJtvkOYDke 9IWmEYwZNLPfYFUK85vJoE/TV/2yQFz7zd2uA3nKTyv60lOw+XydyjWoo2ZMg6ACKRtcZC/rogOtf Ndsw9W2LPESE6EOxHoKfaZv6VA+FIgsw28Yy1ZDc90iw6iGwUxqU9gDM0PqdkeUTTkYlVbChuE1AA Xe/rK16qXEusv7jjnpcfLdD0FkPLBsN2isO0KWIiSzgoOBzjNMrAx7jFtpDvr4nUHYn+X7aKTzLDm W5QZN0d0vCjJgzngP6yK/ugjhqrrnze8O0uLBythaFo0MNNnC0CyhxjIvrwoE3f1nB3CvrGyfc4x5 0b+xcyNg==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1m3t3J-002xmI-Ux; Thu, 15 Jul 2021 04:33:11 +0000 From: "Matthew Wilcox (Oracle)" To: linux-kernel@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, Christoph Hellwig Subject: [PATCH v14 071/138] mm/writeback: Add filemap_dirty_folio() Date: Thu, 15 Jul 2021 04:35:57 +0100 Message-Id: <20210715033704.692967-72-willy@infradead.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210715033704.692967-1-willy@infradead.org> References: <20210715033704.692967-1-willy@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Reimplement __set_page_dirty_nobuffers() as a wrapper around filemap_dirty_folio(). Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Christoph Hellwig --- include/linux/writeback.h | 1 + mm/folio-compat.c | 6 ++++ mm/page-writeback.c | 60 ++++++++++++++++++++------------------- 3 files changed, 38 insertions(+), 29 deletions(-) diff --git a/include/linux/writeback.h b/include/linux/writeback.h index 667e86cfbdcf..eda9cc778ef6 100644 --- a/include/linux/writeback.h +++ b/include/linux/writeback.h @@ -398,6 +398,7 @@ void writeback_set_ratelimit(void); void tag_pages_for_writeback(struct address_space *mapping, pgoff_t start, pgoff_t end); +bool filemap_dirty_folio(struct address_space *mapping, struct folio *folio); void account_page_redirty(struct page *page); void sb_mark_inode_writeback(struct inode *inode); diff --git a/mm/folio-compat.c b/mm/folio-compat.c index 2c2b3917b5dc..dad962b920e5 100644 --- a/mm/folio-compat.c +++ b/mm/folio-compat.c @@ -83,3 +83,9 @@ bool set_page_dirty(struct page *page) return folio_mark_dirty(page_folio(page)); } EXPORT_SYMBOL(set_page_dirty); + +int __set_page_dirty_nobuffers(struct page *page) +{ + return filemap_dirty_folio(page_mapping(page), page_folio(page)); +} +EXPORT_SYMBOL(__set_page_dirty_nobuffers); diff --git a/mm/page-writeback.c b/mm/page-writeback.c index 2dc410b110ff..bd97c461d499 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -2488,41 +2488,43 @@ void __folio_mark_dirty(struct folio *folio, struct address_space *mapping, xa_unlock_irqrestore(&mapping->i_pages, flags); } -/* - * For address_spaces which do not use buffers. Just tag the page as dirty in - * the xarray. - * - * This is also used when a single buffer is being dirtied: we want to set the - * page dirty in that case, but not all the buffers. This is a "bottom-up" - * dirtying, whereas __set_page_dirty_buffers() is a "top-down" dirtying. - * - * The caller must ensure this doesn't race with truncation. Most will simply - * hold the page lock, but e.g. zap_pte_range() calls with the page mapped and - * the pte lock held, which also locks out truncation. +/** + * filemap_dirty_folio - Mark a folio dirty for filesystems which do not use buffer_heads. + * @mapping: Address space this folio belongs to. + * @folio: Folio to be marked as dirty. + * + * Filesystems which do not use buffer heads should call this function + * from their set_page_dirty address space operation. It ignores the + * contents of folio_get_private(), so if the filesystem marks individual + * blocks as dirty, the filesystem should handle that itself. + * + * This is also sometimes used by filesystems which use buffer_heads when + * a single buffer is being dirtied: we want to set the folio dirty in + * that case, but not all the buffers. This is a "bottom-up" dirtying, + * whereas __set_page_dirty_buffers() is a "top-down" dirtying. + * + * The caller must ensure this doesn't race with truncation. Most will + * simply hold the folio lock, but e.g. zap_pte_range() calls with the + * folio mapped and the pte lock held, which also locks out truncation. */ -int __set_page_dirty_nobuffers(struct page *page) +bool filemap_dirty_folio(struct address_space *mapping, struct folio *folio) { - lock_page_memcg(page); - if (!TestSetPageDirty(page)) { - struct address_space *mapping = page_mapping(page); + folio_memcg_lock(folio); + if (folio_test_set_dirty(folio)) { + folio_memcg_unlock(folio); + return false; + } - if (!mapping) { - unlock_page_memcg(page); - return 1; - } - __set_page_dirty(page, mapping, !PagePrivate(page)); - unlock_page_memcg(page); + __folio_mark_dirty(folio, mapping, !folio_test_private(folio)); + folio_memcg_unlock(folio); - if (mapping->host) { - /* !PageAnon && !swapper_space */ - __mark_inode_dirty(mapping->host, I_DIRTY_PAGES); - } - return 1; + if (mapping->host) { + /* !PageAnon && !swapper_space */ + __mark_inode_dirty(mapping->host, I_DIRTY_PAGES); } - unlock_page_memcg(page); - return 0; + return true; } -EXPORT_SYMBOL(__set_page_dirty_nobuffers); +EXPORT_SYMBOL(filemap_dirty_folio); /* * Call this whenever redirtying a page, to de-account the dirty counters -- 2.30.2