linux-ext4 - [PATCH 15/35] btrfs: Use pagevec_lookup_range

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Message-Id: <20170601093245.29238-16-jack@suse.cz>
Date:   Thu,  1 Jun 2017 11:32:25 +0200
From:   Jan Kara <jack@...e.cz>
To:     <linux-mm@...ck.org>
Cc:     Hugh Dickins <hughd@...gle.com>,
        David Howells <dhowells@...hat.com>,
        linux-afs@...ts.infradead.org,
        Ryusuke Konishi <konishi.ryusuke@....ntt.co.jp>,
        linux-nilfs@...r.kernel.org, Bob Peterson <rpeterso@...hat.com>,
        cluster-devel@...hat.com, Jaegeuk Kim <jaegeuk@...nel.org>,
        linux-f2fs-devel@...ts.sourceforge.net, tytso@....edu,
        linux-ext4@...r.kernel.org, Ilya Dryomov <idryomov@...il.com>,
        "Yan, Zheng" <zyan@...hat.com>, ceph-devel@...r.kernel.org,
        linux-btrfs@...r.kernel.org, David Sterba <dsterba@...e.com>,
        "Darrick J . Wong" <darrick.wong@...cle.com>,
        linux-xfs@...r.kernel.org,
        Nadia Yvette Chambers <nyc@...omorphy.com>,
        Jan Kara <jack@...e.cz>
Subject: [PATCH 15/35] btrfs: Use pagevec_lookup_range_tag()

We want only pages from given range in btree_write_cache_pages() and
extent_write_cache_pages(). Use pagevec_lookup_range_tag() instead of
pagevec_lookup_tag() and remove unnecessary code.

CC: linux-btrfs@...r.kernel.org
CC: David Sterba <dsterba@...e.com>
Signed-off-by: Jan Kara <jack@...e.cz>
---
 fs/btrfs/extent_io.c | 19 ++++---------------
 1 file changed, 4 insertions(+), 15 deletions(-)

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index d8da3edf2ac3..6287eaba30ac 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -3837,8 +3837,8 @@ int btree_write_cache_pages(struct address_space *mapping,
 	if (wbc->sync_mode == WB_SYNC_ALL)
 		tag_pages_for_writeback(mapping, index, end);
 	while (!done && !nr_to_write_done && (index <= end) &&
-	       (nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, tag,
-			min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1))) {
+	       (nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end,
+			tag, PAGEVEC_SIZE))) {
 		unsigned i;
 
 		scanned = 1;
@@ -3848,11 +3848,6 @@ int btree_write_cache_pages(struct address_space *mapping,
 			if (!PagePrivate(page))
 				continue;
 
-			if (!wbc->range_cyclic && page->index > end) {
-				done = 1;
-				break;
-			}
-
 			spin_lock(&mapping->private_lock);
 			if (!PagePrivate(page)) {
 				spin_unlock(&mapping->private_lock);
@@ -3984,8 +3979,8 @@ static int extent_write_cache_pages(struct address_space *mapping,
 		tag_pages_for_writeback(mapping, index, end);
 	done_index = index;
 	while (!done && !nr_to_write_done && (index <= end) &&
-	       (nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, tag,
-			min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1))) {
+	       (nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end,
+			tag, PAGEVEC_SIZE))) {
 		unsigned i;
 
 		scanned = 1;
@@ -4010,12 +4005,6 @@ static int extent_write_cache_pages(struct address_space *mapping,
 				continue;
 			}
 
-			if (!wbc->range_cyclic && page->index > end) {
-				done = 1;
-				unlock_page(page);
-				continue;
-			}
-
 			if (wbc->sync_mode != WB_SYNC_NONE) {
 				if (PageWriteback(page))
 					flush_fn(data);
-- 
2.12.3