On Thu, Apr 28, 2022 at 10:45:18PM +0000, Sean Christopherson wrote: > +Sasha and Paolo > > On Thu, Apr 28, 2022, Hugh Dickins wrote: > > On Thu, 28 Apr 2022, Greg Kroah-Hartman wrote: > > > On Thu, Apr 28, 2022 at 09:51:58AM -0700, Hugh Dickins wrote: > > > > On Thu, 28 Apr 2022, Greg Kroah-Hartman wrote: > > > > > > > > > From: Hugh Dickins <hughd@xxxxxxxxxx> > > > > > > > > > > commit bd55b0c2d64e84a75575f548a33a3dfecc135b65 upstream. > > > > > > > > > > PageDoubleMap is maintained differently for anon and for shmem+file: the > > > > > shmem+file one was never cleared, because a safe place to do so could > > > > > not be found; so it would blight future use of the cached hugepage until > > > > > evicted. > > > > > > > > > > See https://lore.kernel.org/lkml/1571938066-29031-1-git-send-email-yang.shi@xxxxxxxxxxxxxxxxx/ > > > > > > > > > > But page_add_file_rmap() does provide a safe place to do so (though later > > > > > than one might wish): allowing testing to return to an initial state > > > > > without a damaging drop_caches. > > > > > > > > > > Link: https://lkml.kernel.org/r/61c5cf99-a962-9a25-597a-53ab1bd8fbc0@xxxxxxxxxx > > > > > Fixes: 9a73f61bdb8a ("thp, mlock: do not mlock PTE-mapped file huge pages") > > > > > Signed-off-by: Hugh Dickins <hughd@xxxxxxxxxx> > > > > > Reviewed-by: Yang Shi <shy828301@xxxxxxxxx> > > > > > Cc: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx> > > > > > Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> > > > > > Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> > > > > > Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> > > > > > > > > NAK. > > > > > > > > I thought we had a long-standing agreement that AUTOSEL does not try > > > > to add patches from akpm's tree which had not been marked for stable. > > > > > > True, this was my attempt at saying "hey these all look like they should > > > go to stable trees, why not?" > > > > Okay, it seems I should have read "AUTOSEL" as "Hey, GregKH here, > > these all look like they should go to stable trees, why not?", > > which would have drawn a friendlier response. > > FWIW, Sasha has been using MANUALSEL for the KVM tree to solicit an explicit ACK > from Paolo for these types of patches. AFAICT, it has been working quite well. Yes, that is what I should have put here, sorry about that. These were manually picked by me and I am asking if they should be included or not. I'll resend after dropping Hugh's patches from the series. thanks, greg k-h
