From: Jan Kara <jack@xxxxxxx> Subject: 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@xxxxxxx Signed-off-by: Jan Kara <jack@xxxxxxx> Reviewed-by: Daniel Jordan <daniel.m.jordan@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/page-writeback.c | 20 ++------------------ 1 file changed, 2 insertions(+), 18 deletions(-) diff -puN mm/page-writeback.c~mm-use-pagevec_lookup_range_tag-in-write_cache_pages mm/page-writeback.c --- a/mm/page-writeback.c~mm-use-pagevec_lookup_range_tag-in-write_cache_pages +++ a/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); _ -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
