+ ext4-use-pagevec_lookup_range_tag.patch added to -mm tree

+ ext4-use-pagevec_lookup_range_tag.patch added to -mm tree

[akpm]

The patch titled
     Subject: ext4: use pagevec_lookup_range_tag()
has been added to the -mm tree.  Its filename is
     ext4-use-pagevec_lookup_range_tag.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/ext4-use-pagevec_lookup_range_tag.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/ext4-use-pagevec_lookup_range_tag.patch

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------------------------------------------------------
From: Jan Kara <jack@suse.cz>
Subject: ext4: use pagevec_lookup_range_tag()

We want only pages from given range in ext4_writepages().  Use
pagevec_lookup_range_tag() instead of pagevec_lookup_tag() and remove
unnecessary code.

Link: http://lkml.kernel.org/r/20171009151359.31984-5-jack@suse.cz
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/ext4/inode.c |   14 ++------------
 1 file changed, 2 insertions(+), 12 deletions(-)

diff -puN fs/ext4/inode.c~ext4-use-pagevec_lookup_range_tag fs/ext4/inode.c
--- a/fs/ext4/inode.c~ext4-use-pagevec_lookup_range_tag
+++ a/fs/ext4/inode.c
@@ -2619,8 +2619,8 @@ static int mpage_prepare_extent_to_map(s
 	mpd->map.m_len = 0;
 	mpd->next_page = index;
 	while (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);
 		if (nr_pages == 0)
 			goto out;
 
@@ -2628,16 +2628,6 @@ static int mpage_prepare_extent_to_map(s
 			struct page *page = pvec.pages[i];
 
 			/*
-			 * At this point, the page may be truncated or
-			 * invalidated (changing page->mapping to NULL), or
-			 * even swizzled back from swapper_space to tmpfs file
-			 * mapping. However, page->index will not change
-			 * because we have a reference on the page.
-			 */
-			if (page->index > end)
-				goto out;
-
-			/*
 			 * Accumulated enough dirty pages? This doesn't apply
 			 * to WB_SYNC_ALL mode. For integrity sync we have to
 			 * keep going because someone may be concurrently
_

Patches currently in -mm which might be from jack@suse.cz are

mm-readahead-increase-maximum-readahead-window.patch
mm-implement-find_get_pages_range_tag.patch
btrfs-use-pagevec_lookup_range_tag.patch
ceph-use-pagevec_lookup_range_tag.patch
ext4-use-pagevec_lookup_range_tag.patch
f2fs-use-pagevec_lookup_range_tag.patch
f2fs-simplify-page-iteration-loops.patch
f2fs-use-find_get_pages_tag-for-looking-up-single-page.patch
gfs2-use-pagevec_lookup_range_tag.patch
nilfs2-use-pagevec_lookup_range_tag.patch
mm-use-pagevec_lookup_range_tag-in-__filemap_fdatawait_range.patch
mm-use-pagevec_lookup_range_tag-in-write_cache_pages.patch
mm-add-variant-of-pagevec_lookup_range_tag-taking-number-of-pages.patch
ceph-use-pagevec_lookup_range_nr_tag.patch
mm-remove-nr_pages-argument-from-pagevec_lookup_range_tag.patch
afs-use-find_get_pages_range_tag.patch
cifs-use-find_get_pages_range_tag.patch