On Tue, 10 Oct 2017 17:19:37 +0200 Jan Kara <jack@xxxxxxx> wrote:
> --- a/mm/truncate.c
> +++ b/mm/truncate.c
> @@ -294,6 +294,14 @@ void truncate_inode_pages_range(struct address_space *mapping,
> while (index < end && pagevec_lookup_entries(&pvec, mapping, index,
> min(end - index, (pgoff_t)PAGEVEC_SIZE),
> indices)) {
> + /*
> + * Pagevec array has exceptional entries and we may also fail
> + * to lock some pages. So we store pages that can be deleted
> + * in an extra array.
> + */
> + struct page *pages[PAGEVEC_SIZE];
> + int batch_count = 0;
OK, but we could still use a new pagevec here. Then
delete_from_page_cache_batch() and page_cache_tree_delete_batch() would
take one less argument.
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