On Mon, Apr 28, 2025 at 12:11:40PM -0700, jane.chu@xxxxxxxxxx wrote: > 6.15-rc3 is orders of magnitude better. > Agreed that device-dax's using folio are likely the heros. I've yet to check > the code and bisect, maybe pin_user_page_fast() adds folios to page_list[] > instead of 4K pages? It does not. I think a bisection would be interesting information Jason
