From patchwork Sun Oct 18 12:04:56 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chandan Rajendra X-Patchwork-Id: 7429901 Return-Path: X-Original-To: patchwork-linux-btrfs@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 4F244BF90C for ; Sun, 18 Oct 2015 12:06:37 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 71FDD206E6 for ; Sun, 18 Oct 2015 12:06:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 711D2206F0 for ; Sun, 18 Oct 2015 12:06:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752837AbbJRMG0 (ORCPT ); Sun, 18 Oct 2015 08:06:26 -0400 Received: from e23smtp04.au.ibm.com ([202.81.31.146]:60691 "EHLO e23smtp04.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752825AbbJRMGY (ORCPT ); Sun, 18 Oct 2015 08:06:24 -0400 Received: from /spool/local by e23smtp04.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Sun, 18 Oct 2015 22:06:21 +1000 X-Helo: d23dlp02.au.ibm.com X-MailFrom: chandan@linux.vnet.ibm.com X-RcptTo: linux-btrfs@vger.kernel.org Received: from d23relay07.au.ibm.com (d23relay07.au.ibm.com [9.190.26.37]) by d23dlp02.au.ibm.com (Postfix) with ESMTP id E13692BB004D for ; Sun, 18 Oct 2015 23:06:20 +1100 (EST) Received: from d23av04.au.ibm.com (d23av04.au.ibm.com [9.190.235.139]) by d23relay07.au.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id t9IC6EeT26280170 for ; Sun, 18 Oct 2015 23:06:22 +1100 Received: from d23av04.au.ibm.com (localhost [127.0.0.1]) by d23av04.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id t9IC5lvA029407 for ; Sun, 18 Oct 2015 23:05:48 +1100 Received: from localhost.in.ibm.com ([9.79.245.171]) by d23av04.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id t9IC5NV2028832; Sun, 18 Oct 2015 23:05:45 +1100 From: Chandan Rajendra To: linux-btrfs@vger.kernel.org Cc: Chandan Rajendra , clm@fb.com, jbacik@fb.com, bo.li.liu@oracle.com, dsterba@suse.cz, quwenruo@cn.fujitsu.com, chandan@mykolab.com Subject: [PATCH V6 06/13] Btrfs: Search for all ordered extents that could span across a page Date: Sun, 18 Oct 2015 17:34:56 +0530 Message-Id: <1445169903-13915-7-git-send-email-chandan@linux.vnet.ibm.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1445169903-13915-1-git-send-email-chandan@linux.vnet.ibm.com> References: <1445169903-13915-1-git-send-email-chandan@linux.vnet.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15101812-0013-0000-0000-0000020A9BF4 Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP In subpagesize-blocksize scenario it is not sufficient to search using the first byte of the page to make sure that there are no ordered extents present across the page. Fix this. Signed-off-by: Chandan Rajendra --- fs/btrfs/extent_io.c | 3 ++- fs/btrfs/inode.c | 25 ++++++++++++++++++------- 2 files changed, 20 insertions(+), 8 deletions(-) diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 11aa8f7..0ee486a 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -3224,7 +3224,8 @@ static int __extent_read_full_page(struct extent_io_tree *tree, while (1) { lock_extent(tree, start, end); - ordered = btrfs_lookup_ordered_extent(inode, start); + ordered = btrfs_lookup_ordered_range(inode, start, + PAGE_CACHE_SIZE); if (!ordered) break; unlock_extent(tree, start, end); diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 294c503..8a79e53 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -1975,7 +1975,8 @@ again: if (PagePrivate2(page)) goto out; - ordered = btrfs_lookup_ordered_extent(inode, page_start); + ordered = btrfs_lookup_ordered_range(inode, page_start, + PAGE_CACHE_SIZE); if (ordered) { unlock_extent_cached(&BTRFS_I(inode)->io_tree, page_start, page_end, &cached_state, GFP_NOFS); @@ -8554,6 +8555,8 @@ static void btrfs_invalidatepage(struct page *page, unsigned int offset, struct extent_state *cached_state = NULL; u64 page_start = page_offset(page); u64 page_end = page_start + PAGE_CACHE_SIZE - 1; + u64 start; + u64 end; int inode_evicting = inode->i_state & I_FREEING; /* @@ -8573,14 +8576,18 @@ static void btrfs_invalidatepage(struct page *page, unsigned int offset, if (!inode_evicting) lock_extent_bits(tree, page_start, page_end, 0, &cached_state); - ordered = btrfs_lookup_ordered_extent(inode, page_start); +again: + start = page_start; + ordered = btrfs_lookup_ordered_range(inode, start, + page_end - start + 1); if (ordered) { + end = min(page_end, ordered->file_offset + ordered->len - 1); /* * IO on this page will never be started, so we need * to account for any ordered extents now */ if (!inode_evicting) - clear_extent_bit(tree, page_start, page_end, + clear_extent_bit(tree, start, end, EXTENT_DIRTY | EXTENT_DELALLOC | EXTENT_LOCKED | EXTENT_DO_ACCOUNTING | EXTENT_DEFRAG, 1, 0, &cached_state, @@ -8597,22 +8604,26 @@ static void btrfs_invalidatepage(struct page *page, unsigned int offset, spin_lock_irq(&tree->lock); set_bit(BTRFS_ORDERED_TRUNCATED, &ordered->flags); - new_len = page_start - ordered->file_offset; + new_len = start - ordered->file_offset; if (new_len < ordered->truncated_len) ordered->truncated_len = new_len; spin_unlock_irq(&tree->lock); if (btrfs_dec_test_ordered_pending(inode, &ordered, - page_start, - PAGE_CACHE_SIZE, 1)) + start, + end - start + 1, 1)) btrfs_finish_ordered_io(ordered); } btrfs_put_ordered_extent(ordered); if (!inode_evicting) { cached_state = NULL; - lock_extent_bits(tree, page_start, page_end, 0, + lock_extent_bits(tree, start, end, 0, &cached_state); } + + start = end + 1; + if (start < page_end) + goto again; } if (!inode_evicting) {