[v4,0/2] xen/balloon: fixes for memory hotplug

Message

Roger Pau Monne Aug. 11, 2020, 9:44 a.m. UTC

Hello,

The following series contain some fixes in order to split Xen
unpopulated memory handling from the ballooning driver if ZONE_DEVICE is
available, so that physical memory regions used to map foreign pages are
not tied to memory hotplug.

The main difference in this version is that MEMORY_DEVICE_DEVDAX is
renamed to MEMORY_DEVICE_GENERIC, as using DEVDAX in the Xen code to
allocate unpopulated memory felt wrong.

Thanks, Roger.

Roger Pau Monne (2):
  memremap: rename MEMORY_DEVICE_DEVDAX to MEMORY_DEVICE_GENERIC
  xen: add helpers to allocate unpopulated memory

 drivers/dax/device.c                    |   2 +-
 drivers/gpu/drm/xen/xen_drm_front_gem.c |   9 +-
 drivers/xen/Kconfig                     |   4 +
 drivers/xen/Makefile                    |   1 +
 drivers/xen/balloon.c                   |   4 +-
 drivers/xen/grant-table.c               |   4 +-
 drivers/xen/privcmd.c                   |   4 +-
 drivers/xen/unpopulated-alloc.c         | 185 ++++++++++++++++++++++++
 drivers/xen/xenbus/xenbus_client.c      |   6 +-
 drivers/xen/xlate_mmu.c                 |   4 +-
 include/linux/memremap.h                |   9 +-
 include/xen/xen.h                       |   9 ++
 mm/memremap.c                           |   2 +-
 13 files changed, 221 insertions(+), 22 deletions(-)
 create mode 100644 drivers/xen/unpopulated-alloc.c