On Tue, Jun 22, 2021 at 12:40:56PM +0100, Matthew Wilcox (Oracle) wrote: > Handle arbitrary-order folios being added to the LRU. By definition, > all pages being added to the LRU were already head or base pages, > so define page wrappers around folio functions where the original > page functions involved calling compound_head() to manipulate flags, > but define folio wrappers around page functions where there's no need to > call compound_head(). The one thing that does change for those functions > is calling compound_nr() instead of thp_nr_pages(), in order to handle > arbitrary-sized folios. > > Saves 783 bytes of kernel text; no functions grow. > > Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> > Reviewed-by: Yu Zhao <yuzhao@xxxxxxxxxx> > Reviewed-by: Christoph Hellwig <hch@xxxxxx> > Reviewed-by: David Howells <dhowells@xxxxxxxxxx> Acked-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx> -- Kirill A. Shutemov
