Re: [PATCH v3 00/15] virtio-mem: paravirtualized memory

Michael S. Tsirkin
2020-05-07T10:49:11Z

On Thu, May 07, 2020 at 12:31:04PM +0200, David Hildenbrand wrote:
> This series is based on latest linux-next. The patches are located at:
> https://github.com/davidhildenbrand/linux.git virtio-mem-v3
>
> Patch #1 - #10 where contained in v2 and only contain minor modifications
> (mostly smaller fixes). The remaining patches are new and contain smaller
> optimizations.

Looks like you lost some acks, in particular I'd like to preserve
Andrew Morton's ack.

> Details about virtio-mem can be found in the cover letter of v2 [1]. A
> basic QEMU implementation was posted yesterday [2].
>
> [1] https://lkml.kernel.org/r/20200311171422.10484-1-david@redhat.com
> [2] https://lkml.kernel.org/r/20200506094948.76388-1-david@redhat.com
>
> 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
>
> Cc: Sebastien Boeuf <sebastien.boeuf@intel.com>
> Cc: Samuel Ortiz <samuel.ortiz@intel.com>
> Cc: Robert Bradford <robert.bradford@intel.com>
> Cc: Luiz Capitulino <lcapitulino@redhat.com>
> Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com>
> Cc: teawater <teawaterz@linux.alibaba.com>
> Cc: Igor Mammedov <imammedo@redhat.com>
> Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
>
> David Hildenbrand (15):
> virtio-mem: Paravirtualized memory hotplug
> 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
> MAINTAINERS: Add myself as virtio-mem maintainer
> 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