On Fri, Feb 03, 2023 at 05:04:01PM +0100, David Hildenbrand wrote: > On 30.01.23 06:11, Matthew Wilcox wrote: > > On Mon, Jan 30, 2023 at 01:34:59PM +0900, Hyeonggon Yoo wrote: > > > > Seems like quite some changes to page_type to accomodate SLAB, which is > > > > hopefully going away soon(TM). Could we perhaps avoid that? > > > > > > If it could be done with less changes, I'll try to avoid that. > > > > Let me outline the idea I had for removing PG_slab: > > > > Observe that PG_reserved and PG_slab are mutually exclusive. Also, > > I recall that there are SetPageReserved() calls on pages allocated via slab. I did a quick scan, and it seems that all allocated reserved pages come from alloc_pages() or vmalloc(). BTW, looking at the current usage of SetPageReserved, it seems that some are bogus/historical and some would justify a different page type if we are to have 15 bits for PG_kernel. > -- > Thanks, > > David / dhildenb -- Sincerely yours, Mike.
