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>
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@ -2196,30 +2196,14 @@ retry:
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while (!done && (index <= end)) {
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while (!done && (index <= end)) {
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int i;
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int i;
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nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, tag,
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nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end,
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min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1);
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tag, PAGEVEC_SIZE);
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if (nr_pages == 0)
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if (nr_pages == 0)
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break;
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break;
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for (i = 0; i < nr_pages; i++) {
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for (i = 0; i < nr_pages; i++) {
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struct page *page = pvec.pages[i];
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struct page *page = pvec.pages[i];
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/*
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* At this point, the page may be truncated or
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* invalidated (changing page->mapping to NULL), or
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* even swizzled back from swapper_space to tmpfs file
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* mapping. However, page->index will not change
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* because we have a reference on the page.
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*/
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if (page->index > end) {
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/*
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* can't be range_cyclic (1st pass) because
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* end == -1 in that case.
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*/
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done = 1;
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break;
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}
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done_index = page->index;
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done_index = page->index;
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lock_page(page);
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lock_page(page);
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