Re: [v2 PATCH 5/9] mm: vmscan: demote anon DRAM pages to PMEM node

[Dave Hansen]

On 4/10/19 8:56 PM, Yang Shi wrote:
>  include/linux/gfp.h            |  12 ++++
>  include/linux/migrate.h        |   1 +
>  include/trace/events/migrate.h |   3 +-
>  mm/debug.c                     |   1 +
>  mm/internal.h                  |  13 +++++
>  mm/migrate.c                   |  15 ++++-
>  mm/vmscan.c                    | 127 +++++++++++++++++++++++++++++++++++------
>  7 files changed, 149 insertions(+), 23 deletions(-)

Yikes, that's a lot of code.

And it only handles anonymous pages?

Also, I don't see anything in the code tying this to strictly demote
from DRAM to PMEM.  Is that the end effect, or is it really implemented
that way and I missed it?