[v18,QEMU,0/3] virtio-balloon: add support for providing free page reporting

Message

Alexander Duyck April 8, 2020, 10:55 p.m. UTC

This series provides an asynchronous means of reporting free guest pages
to QEMU through virtio-balloon so that the memory associated with those
pages can be dropped and reused by other processes and/or guests on the
host. Using this it is possible to avoid unnecessary I/O to disk and
greatly improve performance in the case of memory overcommit on the host.

I originally submitted this patch series[1] back on February 11th 2020,
but at that time I was focused primarily on the kernel portion of this
patch set. However as of April 7th those patches are now included in
Linus's kernel tree[2] and so I thought I should resubmit the QEMU side of
this for inclusion so that the feature will be available in QEMU hopefully
by the time the 5.7 kernel tree is released.

[1]: https://lore.kernel.org/lkml/[e-mail]/
[2]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b0c504f154718904ae49349147e3b7e6ae91ffdc

Changes from v17:
Fixed typo in patch 1 title
Addressed white-space issues reported via checkpatch
Added braces {} for two if statements to match expected coding style

---

Alexander Duyck (3):
      virtio-balloon: Implement support for page poison tracking feature
      virtio-balloon: Add support for providing free page reports to host
      virtio-balloon: Provide a interface for free page reporting


 hw/virtio/virtio-balloon.c                      |   70 ++++++++++++++++++++++-
 include/hw/virtio/virtio-balloon.h              |    3 +
 include/standard-headers/linux/virtio_balloon.h |    1 
 3 files changed, 69 insertions(+), 5 deletions(-)

--