As BIO_MAX_PAGES is smaller (on x86) than HPAGE_PMD_NR, we cannot use the optimization ext4_mpage_readpages() provides. So, for huge pages, we fallback directly to block_read_full_page(). This should be re-visited once we get multipage bvec upstream. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx> --- fs/ext4/readpage.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/ext4/readpage.c b/fs/ext4/readpage.c index a81b829d56de..b865df0c0973 100644 --- a/fs/ext4/readpage.c +++ b/fs/ext4/readpage.c @@ -134,7 +134,7 @@ int ext4_mpage_readpages(struct address_space *mapping, goto next_page; } - if (page_has_buffers(page)) + if (page_has_buffers(page) || PageTransHuge(page)) goto confused; block_in_file = (sector_t)page->index << (PAGE_SHIFT - blkbits); -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe linux-block" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
