On Fri, Mar 22, 2024 at 04:11:45PM +0000, Matthew Wilcox (Oracle) wrote: > struct page is going to lose its refcount (someday) and as part of > that page_ref_freeze() will go away. s390's ultravisor is one of > the few remaining places that uses it, so convert it over to folios. > From previous interactions, I understand that ultravisor doesn't support > large folios, so this simply declines to make large folios secure. > I think you'd be better off splitting the folio if it is large, but > that's something I'd rather leave to someone who can test it. > > These patches do have the effect of making this more efficient; we lose > at least five hidden calls to compound_head(). > > Matthew Wilcox (Oracle) (2): > s390: Convert make_page_secure to use a folio > s390: Convert gmap_make_secure to use a folio > > arch/s390/kernel/uv.c | 50 +++++++++++++++++++++++-------------------- > 1 file changed, 27 insertions(+), 23 deletions(-) Christian, Janosch, or Claudio, could you have a look at this please; and provide an ACK if this is ok with you?
