On Fri, Feb 03, 2023 at 09:16:33PM +0800, Yin Fengwei wrote: > filemap_map_folio_range() maps partial/full folio. Comparing to > original filemap_map_pages(), it batched updates refcount and > get minor performance improvement for large folio. > > a self cooked will-it-scale.page_fault3 like app (change file > write fault to read fault) with xfs filesystem got 2% performance > gain. Please delete folio_more_pages() as part of this patch; this was the only caller. > + ret |= filemap_map_folio_range(vmf, folio, > + xas.xa_index - folio->index, addr, nr_pages); Sorry to nitpick, but there's an extra space between |= and filemap_map_folio_range() here.
