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authorJan Kara <jack@suse.cz>2017-11-15 17:35:09 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-11-15 18:21:04 -0800
commit2b9775ae422fa46b4aee2bb2a8d2184a5a3b90e0 (patch)
treec9ddb86cd863d381b72594fbbce2e693c2b780bc /mm/page-writeback.c
parent312e9d2f7053f480627dcaf5e14f9cae78e3715a (diff)
downloadlinux-2b9775ae422fa46b4aee2bb2a8d2184a5a3b90e0.tar.bz2
mm: use pagevec_lookup_range_tag() in write_cache_pages()
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. Link: http://lkml.kernel.org/r/20171009151359.31984-12-jack@suse.cz Signed-off-by: Jan Kara <jack@suse.cz> Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page-writeback.c')
-rw-r--r--mm/page-writeback.c20
1 files changed, 2 insertions, 18 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 768fe4e37e6a..460fc022cbc8 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -2196,30 +2196,14 @@ retry:
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);