From: Jan Kara <jack@suse.cz>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: <linux-mm@kvack.org>, <linux-fsdevel@vger.kernel.org>,
Daniel Jordan <daniel.m.jordan@oracle.com>,
Jan Kara <jack@suse.cz>
Subject: [PATCH 11/16] mm: Use pagevec_lookup_range_tag() in write_cache_pages()
Date: Mon, 9 Oct 2017 17:13:54 +0200 [thread overview]
Message-ID: <20171009151359.31984-12-jack@suse.cz> (raw)
In-Reply-To: <20171009151359.31984-1-jack@suse.cz>
Use pagevec_lookup_range_tag() in write_cache_pages() as it is
interested only in pages from given range. Remove unnecessary code
resulting from this.
Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com>
Signed-off-by: Jan Kara <jack@suse.cz>
---
mm/page-writeback.c | 20 ++------------------
1 file changed, 2 insertions(+), 18 deletions(-)
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 0b9c5cbe8eba..43b18e185fbd 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -2194,30 +2194,14 @@ int write_cache_pages(struct address_space *mapping,
while (!done && (index <= end)) {
int i;
- 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)
break;
for (i = 0; i < nr_pages; i++) {
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) {
- /*
- * can't be range_cyclic (1st pass) because
- * end == -1 in that case.
- */
- done = 1;
- break;
- }
-
done_index = page->index;
lock_page(page);
--
2.12.3
--
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next prev parent reply other threads:[~2017-10-09 15:13 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-09 15:13 [PATCH 0/16 v3] Ranged pagevec tagged lookup Jan Kara
2017-10-09 15:13 ` [PATCH 01/16] mm: Implement find_get_pages_range_tag() Jan Kara
2017-10-09 15:13 ` [PATCH 02/16] btrfs: Use pagevec_lookup_range_tag() Jan Kara
2017-10-09 15:13 ` [PATCH 03/16] ceph: " Jan Kara
2017-10-09 15:13 ` [PATCH 04/16] ext4: " Jan Kara
2017-10-09 15:13 ` [PATCH 05/16] f2fs: " Jan Kara
2017-10-09 15:13 ` [PATCH 06/16] f2fs: Simplify page iteration loops Jan Kara
2017-10-09 15:13 ` [PATCH 07/16] f2fs: Use find_get_pages_tag() for looking up single page Jan Kara
2017-10-09 15:13 ` [PATCH 08/16] gfs2: Use pagevec_lookup_range_tag() Jan Kara
2017-10-09 15:13 ` [PATCH 09/16] nilfs2: " Jan Kara
2017-10-09 15:13 ` [PATCH 10/16] mm: Use pagevec_lookup_range_tag() in __filemap_fdatawait_range() Jan Kara
2017-10-09 15:13 ` Jan Kara [this message]
2017-10-09 15:13 ` [PATCH 12/16] mm: Add variant of pagevec_lookup_range_tag() taking number of pages Jan Kara
2017-10-09 15:13 ` [PATCH 13/16] ceph: Use pagevec_lookup_range_nr_tag() Jan Kara
2017-10-09 15:13 ` [PATCH 14/16] mm: Remove nr_pages argument from pagevec_lookup_{,range}_tag() Jan Kara
2017-10-09 15:13 ` [PATCH 15/16] afs: Use find_get_pages_range_tag() Jan Kara
2017-10-09 15:13 ` [PATCH 16/16] cifs: " Jan Kara
2017-10-10 17:48 ` Daniel Jordan
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