[PATCH v4 00/15] virtio-mem: paravirtualized memory

David Hildenbrand
2020-05-07T14:01:24Z

This series is based on v5.7-rc4. The patches are located at:
    https://github.com/davidhildenbrand/linux.git virtio-mem-v4

This is basically a resend of v3 [1], now based on v5.7-rc4 and restested.
One patch was reshuffled and two ACKs I missed to add were added. The
rebase did not require any modifications to patches.

Details about virtio-mem can be found in the cover letter of v2 [2]. A
basic QEMU implementation was posted yesterday [3].

[1] https://lkml.kernel.org/r/20200507103119.11219-1-david at redhat.com
[2] https://lkml.kernel.org/r/20200311171422.10484-1-david at redhat.com
[3] https://lkml.kernel.org/r/20200506094948.76388-1-david at redhat.com

v3 -> v4:
- Move "MAINTAINERS: Add myself as virtio-mem maintainer" to #2
- Add two ACKs from Andrew (in reply to v2)
-- "mm: Allow to offline unmovable PageOffline() pages via ..."
-- "mm/memory_hotplug: Introduce offline_and_remove_memory()"

v2 -> v3:
- "virtio-mem: Paravirtualized memory hotplug"
-- Include "linux/slab.h" to fix build issues
-- Remember the "region_size", helpful for patch #11
-- Minor simplifaction in virtio_mem_overlaps_range()
-- Use notifier_from_errno() instead of notifier_to_errno() in notifier
-- More reliable check for added memory when unloading the driver
- "virtio-mem: Allow to specify an ACPI PXM as nid"
-- Also print the nid
- Added patch #11-#15

David Hildenbrand (15):
  virtio-mem: Paravirtualized memory hotplug
  MAINTAINERS: Add myself as virtio-mem maintainer
  virtio-mem: Allow to specify an ACPI PXM as nid
  virtio-mem: Paravirtualized memory hotunplug part 1
  virtio-mem: Paravirtualized memory hotunplug part 2
  mm: Allow to offline unmovable PageOffline() pages via
    MEM_GOING_OFFLINE
  virtio-mem: Allow to offline partially unplugged memory blocks
  mm/memory_hotplug: Introduce offline_and_remove_memory()
  virtio-mem: Offline and remove completely unplugged memory blocks
  virtio-mem: Better retry handling
  virtio-mem: Add parent resource for all added "System RAM"
  virtio-mem: Drop manual check for already present memory
  virtio-mem: Unplug subblocks right-to-left
  virtio-mem: Use -ETXTBSY as error code if the device is busy
  virtio-mem: Try to unplug the complete online memory block first

 MAINTAINERS                     |    7 +
 drivers/acpi/numa/srat.c        |    1 +
 drivers/virtio/Kconfig          |   17 +
 drivers/virtio/Makefile         |    1 +
 drivers/virtio/virtio_mem.c     | 1962 +++++++++++++++++++++++++++++++
 include/linux/memory_hotplug.h  |    1 +
 include/linux/page-flags.h      |   10 +
 include/uapi/linux/virtio_ids.h |    1 +
 include/uapi/linux/virtio_mem.h |  208 ++++
 mm/memory_hotplug.c             |   81 +-
 mm/page_alloc.c                 |   26 +
 mm/page_isolation.c             |    9 +
 12 files changed, 2314 insertions(+), 10 deletions(-)
 create mode 100644 drivers/virtio/virtio_mem.c
 create mode 100644 include/uapi/linux/virtio_mem.h

--
2.25.3