From patchwork Thu Jul 15 03:36:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 12378947 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=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 62266C07E96 for ; Thu, 15 Jul 2021 05:21:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 40D9661374 for ; Thu, 15 Jul 2021 05:21:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231889AbhGOFYS (ORCPT ); Thu, 15 Jul 2021 01:24:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40858 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230076AbhGOFYR (ORCPT ); Thu, 15 Jul 2021 01:24:17 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 09C39C06175F; Wed, 14 Jul 2021 22:21:25 -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=7mM+4r3MgelJWIdGY296pIhhgFaWpEQSXi+vxd43vYc=; b=o+I6Q5JO0e9YRe5ZHrqSyKTMBT LWnzgyk1ChESJw43DpEOSq6Qr/aXeUU431Z13DS9M2LskBBAIhItt4n1Rf+GygcU9JErB21wBJYAu pFW1jNIE1ZwPaQ976e2Y4RUQQ6hQoV7A7mZQw/RFPlrPMYYXIuL0u0OHpyiOawxGvfYrw8mdBFig3 mZUI0k7MG/Z80sOec24gMya7ov1d4tV9ISwFWkTtVOMUZ+x75tTJfFLhwipIQe+tb/Dv0bgB+cBZj rQyKYZB+uqGOPGMhucHmKSmE+qWWsf7zu+NcLr3j8zHf/02JSsm9w7v/4uKO7plrpHgT4HioVX2nz B/sOfcjA==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1m3tn3-0030oU-0B; Thu, 15 Jul 2021 05:20:17 +0000 From: "Matthew Wilcox (Oracle)" To: linux-kernel@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org Subject: [PATCH v14 128/138] iomap: Support multi-page folios in invalidatepage Date: Thu, 15 Jul 2021 04:36:54 +0100 Message-Id: <20210715033704.692967-129-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 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org If we're punching a hole in a multi-page folio, we need to remove the per-page iomap data as the folio is about to be split and each page will need its own. This means that writepage can now come across a page with no iop allocated, so remove the assertion that there is already one, and just create one (with the uptodate bits set) if there isn't one. Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Darrick J. Wong --- fs/iomap/buffered-io.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index 48de198c5603..7f78256fc0ba 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -474,13 +474,17 @@ iomap_invalidatepage(struct page *page, unsigned int offset, unsigned int len) trace_iomap_invalidatepage(folio->mapping->host, offset, len); /* - * If we are invalidating the entire page, clear the dirty state from it - * and release it to avoid unnecessary buildup of the LRU. + * If we are invalidating the entire folio, clear the dirty state + * from it and release it to avoid unnecessary buildup of the LRU. */ if (offset == 0 && len == folio_size(folio)) { WARN_ON_ONCE(folio_test_writeback(folio)); folio_cancel_dirty(folio); iomap_page_release(folio); + } else if (folio_multi(folio)) { + /* Must release the iop so the page can be split */ + WARN_ON_ONCE(!folio_test_uptodate(folio) && folio_test_dirty(folio)); + iomap_page_release(folio); } } EXPORT_SYMBOL_GPL(iomap_invalidatepage); @@ -1300,7 +1304,7 @@ iomap_writepage_map(struct iomap_writepage_ctx *wpc, struct writeback_control *wbc, struct inode *inode, struct folio *folio, loff_t end_pos) { - struct iomap_page *iop = to_iomap_page(folio); + struct iomap_page *iop = iomap_page_create(inode, folio); struct iomap_ioend *ioend, *next; unsigned len = i_blocksize(inode); unsigned nblocks = i_blocks_per_folio(inode, folio); @@ -1308,7 +1312,6 @@ iomap_writepage_map(struct iomap_writepage_ctx *wpc, int error = 0, count = 0, i; LIST_HEAD(submit_list); - WARN_ON_ONCE(nblocks > 1 && !iop); WARN_ON_ONCE(iop && atomic_read(&iop->write_bytes_pending) != 0); /*