On 8/12/21 11:31 PM, Alex Sierra wrote:
From: Ralph Campbell <rcampb...@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.
v2:
AS: merged this patch in linux 5.11 version
v5:
AS: add condition at try_grab_page to check for the zone device type, while
page ref counter is checked less/equal to zero. In case of device zone, pages
ref counter are initialized to zero.
Signed-off-by: Ralph Campbell <rcampb...@nvidia.com>
Signed-off-by: Alex Sierra <alex.sie...@amd.com>
---
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 | 13 +----
lib/test_hmm.c | 2 +-
mm/internal.h | 8 +++
mm/memremap.c | 68 +++++++-------------------
mm/migrate.c | 5 --
mm/page_alloc.c | 3 ++
mm/swap.c | 45 ++---------------
12 files changed, 46 insertions(+), 115 deletions(-)
I haven't seen a response to the issues I raised back at v3 of this series.
https://lore.kernel.org/linux-mm/4f6dd918-d79b-1aa7-3a4c-caa67ddc2...@nvidia.com/
Did I miss something?
