On 2022-01-28 7:21 a.m., Jason Gunthorpe wrote: > On Thu, Jan 27, 2022 at 05:25:52PM -0700, Logan Gunthorpe wrote: >> From: Ralph Campbell <rcampbell@xxxxxxxxxx> >> >> ZONE_DEVICE struct pages have an extra reference count that complicates the >> code for put_page() and several places in the kernel that need to check the >> reference count to see that a page is not being used (gup, compaction, >> migration, etc.). Clean up the code so the reference count doesn't need to >> be treated specially for ZONE_DEVICE. >> >> [logang: dropped no longer used section from mm.h including >> page_is_devmap_managed, rebased on v5.17-rc1 (possibly poorly)] >> Signed-off-by: Ralph Campbell <rcampbell@xxxxxxxxxx> >> Signed-off-by: Alex Sierra <alex.sierra@xxxxxxx> >> Signed-off-by: Logan Gunthorpe <logang@xxxxxxxxxxxx> >> Reviewed-by: Christoph Hellwig <hch@xxxxxx> >> --- >> arch/powerpc/kvm/book3s_hv_uvmem.c | 2 +- >> drivers/gpu/drm/nouveau/nouveau_dmem.c | 2 +- >> fs/dax.c | 4 +- >> include/linux/dax.h | 2 +- >> include/linux/memremap.h | 7 +-- >> include/linux/mm.h | 44 ---------------- >> lib/test_hmm.c | 2 +- >> mm/internal.h | 8 +++ >> mm/memcontrol.c | 6 +-- >> mm/memremap.c | 70 +++++++------------------- >> mm/migrate.c | 5 -- >> mm/page_alloc.c | 3 ++ >> mm/swap.c | 45 ++--------------- >> 13 files changed, 46 insertions(+), 154 deletions(-) > > This patch still can't be applied until the FSDAX issues are solved, > right? See my remarks the last time it was posted.. Yes. As I mentioned in the cover, this is just to show that this patchset is compatible with the direction this patch goes. Logan
