[PATCH v1 0/4] virtio-mem: memory unplug/offlining related cleanups

David Hildenbrand
2023-07-13T14:56:59Z

Some cleanups+optimizations primarily around offline_and_remove_memory().

Patch #1 drops the "unsafe unplug" feature where we might get stuck in
offline_and_remove_memory() forever.

Patch #2 handles unexpected errors from offline_and_remove_memory() a bit
nicer.

Patch #3 handles the case where offline_and_remove_memory() failed and
we want to retry later to remove a completely unplugged Linux memory
block, to not have them waste memory forever.

Patch #4 something I had lying around for longer, which reacts faster
on config changes when unplugging memory.

Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Xuan Zhuo <xuanzhuo@linux.alibaba.com>

David Hildenbrand (4):
virtio-mem: remove unsafe unplug in Big Block Mode (BBM)
virtio-mem: convert most offline_and_remove_memory() errors to -EBUSY
virtio-mem: keep retrying on offline_and_remove_memory() errors in Sub
Block Mode (SBM)
virtio-mem: check if the config changed before fake offlining memory

drivers/virtio/virtio_mem.c | 168 ++++++++++++++++++++++++------------
1 file changed, 112 insertions(+), 56 deletions(-)

base-commit: 3f01e9fed8454dcd89727016c3e5b2fbb8f8e50c
--
2.41.0