On Sun, Mar 31, 2019 at 04:11:34PM +0800, Liu Xiang wrote: > In ext4_mpage_readpages(), if the parameter pages is not NULL, another > parameter page is NULL. At the first time prefetchw(&page->flags) > works on NULL. From second time, prefetchw(&page->flags) always works on > the last consumed page. This might do little improvment for handling > current page. So prefetchw() should be called while the page pointer > has just been updated. Thanks, applied. - Ted
