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=-12.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,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 38BD1C433E7 for ; Wed, 14 Oct 2020 03:04:05 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 3CC8421D7F for ; Wed, 14 Oct 2020 03:04:03 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="G1zcZpij" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3CC8421D7F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 6315D6B005D; Tue, 13 Oct 2020 23:04:03 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 5BA4A6B0062; Tue, 13 Oct 2020 23:04:03 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 4A8846B0068; Tue, 13 Oct 2020 23:04:03 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0007.hostedemail.com [216.40.44.7]) by kanga.kvack.org (Postfix) with ESMTP id 1AC2A6B005D for ; Tue, 13 Oct 2020 23:04:03 -0400 (EDT) Received: from smtpin08.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id AE0EA180AD806 for ; Wed, 14 Oct 2020 03:04:02 +0000 (UTC) X-FDA: 77369036724.08.limit58_5a11b3227208 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin08.hostedemail.com (Postfix) with ESMTP id 9463F1819E76F for ; Wed, 14 Oct 2020 03:04:02 +0000 (UTC) X-HE-Tag: limit58_5a11b3227208 X-Filterd-Recvd-Size: 4115 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf48.hostedemail.com (Postfix) with ESMTP for ; Wed, 14 Oct 2020 03:04:01 +0000 (UTC) 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=HCUdH2gZ2mH2ZOiD3F29fY5+kaO7fY88tsiSFo4riTw=; b=G1zcZpijkarteofqchFTXXIIQW vBzEil6I7JRxpZhCNqz47pCtJDP7jL4ydibo68z1pfHAPcz61TtjnPUJhrlcFcdIlC7bvUYxbzeh/ gJT6IDybpCuGYNxLXQjLqzgXPCUXNc+/rhDMz/EEzpn9lfb+5bqYrmycSOoFL53Mp4sDaMHYQIBDg KPppMqsoDEr3OPtV5qQUzC5jCog+ZAXl8qlkiSXQvHxwA+6vuPrkWEt2CChpDRoyQpKg0ZYufrNph 5NnMUCqhIq8sstn9ovmiKWm0Jkaz9Xm/8fxX0BQZFzsoatYJ/6tCa7pl6fM+vVThtLsNZsJI/iHWH hBn5sAuw==; Received: from willy by casper.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1kSX56-0005ia-FO; Wed, 14 Oct 2020 03:04:00 +0000 From: "Matthew Wilcox (Oracle)" To: linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" , linux-mm@kvack.org Subject: [PATCH 05/14] iomap: Support THPs in invalidatepage Date: Wed, 14 Oct 2020 04:03:48 +0100 Message-Id: <20201014030357.21898-6-willy@infradead.org> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20201014030357.21898-1-willy@infradead.org> References: <20201014030357.21898-1-willy@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: If we're punching a hole in a THP, we need to remove the per-page iomap data as the THP 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) --- fs/iomap/buffered-io.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index 95ac66731297..4633ebd03a3f 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -60,6 +60,8 @@ iomap_page_create(struct inode *inode, struct page *pag= e) iop =3D kzalloc(struct_size(iop, uptodate, BITS_TO_LONGS(nr_blocks)), GFP_NOFS | __GFP_NOFAIL); spin_lock_init(&iop->uptodate_lock); + if (PageUptodate(page)) + bitmap_fill(iop->uptodate, nr_blocks); attach_page_private(page, iop); return iop; } @@ -494,10 +496,14 @@ iomap_invalidatepage(struct page *page, unsigned in= t offset, unsigned int len) * If we are invalidating the entire page, clear the dirty state from i= t * and release it to avoid unnecessary buildup of the LRU. */ - if (offset =3D=3D 0 && len =3D=3D PAGE_SIZE) { + if (offset =3D=3D 0 && len =3D=3D thp_size(page)) { WARN_ON_ONCE(PageWriteback(page)); cancel_dirty_page(page); iomap_page_release(page); + } else if (PageTransHuge(page)) { + /* Punching a hole in a THP requires releasing the iop */ + WARN_ON_ONCE(!PageUptodate(page) && PageDirty(page)); + iomap_page_release(page); } } EXPORT_SYMBOL_GPL(iomap_invalidatepage); @@ -1363,14 +1369,13 @@ iomap_writepage_map(struct iomap_writepage_ctx *w= pc, struct writeback_control *wbc, struct inode *inode, struct page *page, u64 end_offset) { - struct iomap_page *iop =3D to_iomap_page(page); + struct iomap_page *iop =3D iomap_page_create(inode, page); struct iomap_ioend *ioend, *next; unsigned len =3D i_blocksize(inode); u64 file_offset; /* file offset of page */ int error =3D 0, count =3D 0, i; LIST_HEAD(submit_list); =20 - WARN_ON_ONCE(i_blocks_per_page(inode, page) > 1 && !iop); WARN_ON_ONCE(iop && atomic_read(&iop->write_bytes_pending) !=3D 0); =20 /* @@ -1415,7 +1420,6 @@ iomap_writepage_map(struct iomap_writepage_ctx *wpc= , */ if (wpc->ops->discard_page) wpc->ops->discard_page(page); - ClearPageUptodate(page); unlock_page(page); goto done; } --=20 2.28.0