On Fri 08-11-19 00:08:03, Toshiki Fukasawa wrote: > This patch set tries to make pfn walker support ZONE_DEVICE. > This idea is from the TODO in below patch: > > commit aad5f69bc161af489dbb5934868bd347282f0764 > Author: David Hildenbrand <david@xxxxxxxxxx> > Date: Fri Oct 18 20:19:20 2019 -0700 > > fs/proc/page.c: don't access uninitialized memmaps in fs/proc/page.c > > pfn walker's ZONE_DEVICE support requires capability to identify > that a memmap has been initialized. The uninitialized cases are > as follows: > > a) pages reserved for ZONE_DEVICE driver > b) pages currently initializing > > This patch set solves both of them. Why do we want this? What is the usecase? > > Toshiki Fukasawa (3): > procfs: refactor kpage_*_read() in fs/proc/page.c > mm: Introduce subsection_dev_map > mm: make pfn walker support ZONE_DEVICE > > fs/proc/page.c | 155 ++++++++++++++++++++--------------------------- > include/linux/memremap.h | 6 ++ > include/linux/mmzone.h | 19 ++++++ > mm/memremap.c | 31 ++++++++++ > mm/sparse.c | 32 ++++++++++ > 5 files changed, 154 insertions(+), 89 deletions(-) > > -- > 1.8.3.1 > -- Michal Hocko SUSE Labs
