On Thu, Mar 03, 2022 at 02:28:46PM -0800, Hugh Dickins wrote: > On Thu, 3 Mar 2022, David Hildenbrand wrote: > > On 03.03.22 02:56, Hugh Dickins wrote: > > > The PG_waiters bit is not included in PAGE_FLAGS_CHECK_AT_FREE, and > > > vmscan.c's free_unref_page_list() callers rely on that not to generate > > > bad_page() alerts. So __page_cache_release() and release_pages() (and > > > the presumably copy-and-pasted put_zone_device_private_or_public_page()) > > Hah, I'm showing my age there, or the patch's age: it's been rebranded > frequently since then, with linux-next calling it free_zone_device_page(), > as you kindly point out. How long before it's free_zone_device_folio()? Probably not a serious question, but within the next year, I expect. I have a prototype patch to do the entire page freeing path, but it wasn't a priority for this merge window.
