[Qemu-devel] [PATCH 0/5] hostmem-file: Add "persistent" option

[Eduardo Habkost]

This series adds a new "persistent" option to
memory-backend-file.  The new option it will be useful if
somebody is sharing RAM contents on a file using share=on, but
don't need it to be flushed to disk when QEMU exits.

Internally, it will trigger a madvise(MADV_REMOVE) or
fallocate(FALLOC_FL_PUNCH_HOLE) call when the memory backend is
destroyed.

To make we actually trigger the new code when QEMU exits, the
first patch in the series ensures we destroy all user-created
objects when exiting QEMU.

Eduardo Habkost (5):
  vl: Clean up user-creatable objects when exiting
  memory: Allow RAM up to block->max_length to be discarded
  memory: Add RAM_NONPERSISTENT flag
  memory: Add 'persistent' parameter to
    memory_region_init_ram_from_file()
  hostmem-file: Add "persistent" option

 include/exec/memory.h           |  4 ++++
 include/exec/ram_addr.h         |  4 ++--
 include/qom/object_interfaces.h |  8 ++++++++
 backends/hostmem-file.c         | 35 ++++++++++++++++++++++++++++++++++-
 exec.c                          | 26 ++++++++++++++++++++++----
 memory.c                        |  4 +++-
 numa.c                          |  2 +-
 qom/object_interfaces.c         |  5 +++++
 vl.c                            |  1 +
 qemu-options.hx                 |  9 ++++++++-
 10 files changed, 88 insertions(+), 10 deletions(-)

-- 
2.11.0.259.g40922b1