On Thu, Aug 12, 2021 at 01:56:24PM +0200, Vlastimil Babka wrote: > On 7/15/21 5:35 AM, Matthew Wilcox (Oracle) wrote: > > This is the folio equivalent of migrate_page_copy(), which is retained > > as a wrapper for filesystems which are not yet converted to folios. > > Also convert copy_huge_page() to folio_copy(). > > > > Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> > > Acked-by: Vlastimil Babka <vbabka@xxxxxxx> > > The way folio_copy() avoids cond_resched() for single page would IMHO deserve a > comment though, so it's not buried only in this thread. I think folio_copy() deserves kernel-doc. /** * folio_copy - Copy the contents of one folio to another. * @dst: Folio to copy to. * @src: Folio to copy from. * * The bytes in the folio represented by @src are copied to @dst. * Assumes the caller has validated that @dst is at least as large as @src. * Can be called in atomic context for order-0 folios, but if the folio is * larger, it may sleep. */
