[libvirt] [PATCH v3 0/3] Add "memfd" memory backing type (resend)

[marcandre.lureau at redhat.com]

From: Marc-André Lureau <marcandre.lureau at redhat.com>

Hi,

This is an alternative series from "[PATCH 0/5] Use memfd if
possible". Instead of automatically using memfd for anonymous memory
when available (as suggested by Daniel), it introduces the "memfd"
memory backing type.

Although using memfd transparently when possible is a good idea, it is
a source of various complications for migration & save/restore. This
could eventually be challenged in a different series.

*please*:
The first two patches have been modified and reviewed by John
Ferlan. Hopefully they can be merged early, regardless of the last
patch outcome, to avoid the painful rebase conflicts due to
capabilities checks introduction.

Thanks :)

v3:
 - rebased, to fix capabilities check and ping the series

Marc-André Lureau (3):
  qemu: add memory-backend-memfd capability check
  qemu: check memory-backend-memfd.hugetlb capability
  qemu: add memfd source type

 docs/formatdomain.html.in                     |   9 +-
 docs/schemas/domaincommon.rng                 |   1 +
 src/conf/domain_conf.c                        |   3 +-
 src/conf/domain_conf.h                        |   1 +
 src/qemu/qemu_capabilities.c                  |  10 ++
 src/qemu/qemu_capabilities.h                  |   2 +
 src/qemu/qemu_command.c                       |  69 +++++++----
 src/qemu/qemu_domain.c                        |  12 +-
 .../caps_2.12.0.aarch64.replies               |  94 ++++++++++++---
 .../caps_2.12.0.aarch64.xml                   |   4 +-
 .../caps_2.12.0.ppc64.replies                 |  90 +++++++++++---
 .../caps_2.12.0.ppc64.xml                     |   4 +-
 .../caps_2.12.0.s390x.replies                 |  98 ++++++++++++----
 .../caps_2.12.0.s390x.xml                     |   4 +-
 .../caps_2.12.0.x86_64.replies                | 110 +++++++++++++-----
 .../caps_2.12.0.x86_64.xml                    |   4 +-
 .../caps_3.0.0.ppc64.replies                  |  90 +++++++++++---
 .../qemucapabilitiesdata/caps_3.0.0.ppc64.xml |   4 +-
 .../caps_3.0.0.riscv32.replies                |  86 +++++++++++---
 .../caps_3.0.0.riscv32.xml                    |   2 +
 .../caps_3.0.0.riscv64.replies                |  86 +++++++++++---
 .../caps_3.0.0.riscv64.xml                    |   2 +
 .../caps_3.0.0.s390x.replies                  |  98 ++++++++++++----
 .../qemucapabilitiesdata/caps_3.0.0.s390x.xml |   4 +-
 .../caps_3.0.0.x86_64.replies                 | 110 +++++++++++++-----
 .../caps_3.0.0.x86_64.xml                     |   4 +-
 .../memfd-memory-numa.x86_64-latest.args      |  34 ++++++
 tests/qemuxml2argvdata/memfd-memory-numa.xml  |  36 ++++++
 tests/qemuxml2argvtest.c                      |   2 +
 29 files changed, 869 insertions(+), 204 deletions(-)
 create mode 100644 tests/qemuxml2argvdata/memfd-memory-numa.x86_64-latest.args
 create mode 100644 tests/qemuxml2argvdata/memfd-memory-numa.xml

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2.19.1.708.g4ede3d42df