Messages in this thread | | | Date | Fri, 28 Jan 2022 09:16:25 -0800 | Subject | Re: [PATCH v5 02/24] mm: remove extra ZONE_DEVICE struct page refcount | From | Ralph Campbell <> |
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On 1/28/22 06:21, Jason Gunthorpe wrote: > On Thu, Jan 27, 2022 at 05:25:52PM -0700, Logan Gunthorpe wrote: >> From: Ralph Campbell <rcampbell@nvidia.com> >> >> 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@nvidia.com> >> Signed-off-by: Alex Sierra <alex.sierra@amd.com> >> Signed-off-by: Logan Gunthorpe <logang@deltatee.com> >> Reviewed-by: Christoph Hellwig <hch@lst.de> >> --- >> 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.. > > Jason
That is my understanding too.
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