From: Michael Galaxy <mgalaxy@xxxxxxxxxx>
CPR-based support for whole-hypervisor kexec-based live updates is
now finally merged into QEMU. In support of this, we need NUMA to be
supported in these kinds of environments. To do this we use a technology
called PMEM (persistent memory) in Linux, which underpins the ability for
CPR Live Updates to work so that QEMU memory can remain in RAM and
be recovered after a kexec operationg has completed. Our systems are highly
NUMA-aware, and so this patch series enables NUMA awareness for live updates.
Further, we make a small change that allows live migrations to work
between *non* PMEM-based systems and PMEM-based systems (and
vice-versa). This allows for seemless upgrades from non-live-compatible
systems to live-update-compatible sytems without any downtime.
Michael Galaxy (4):
qemu.conf changes to support multiple memory backend
Support live migration between file-backed memory and anonymous
memory.
Update unit test to support multiple memory backends
Update documentation to reflect memory_backing_dir change in qemu.conf
NEWS.rst | 7 ++
docs/kbase/virtiofs.rst | 2 +
src/qemu/qemu.conf.in | 2 +
src/qemu/qemu_command.c | 8 ++-
src/qemu/qemu_conf.c | 141 +++++++++++++++++++++++++++++++++++-----
src/qemu/qemu_conf.h | 14 ++--
src/qemu/qemu_domain.c | 24 +++++--
src/qemu/qemu_driver.c | 29 +++++----
src/qemu/qemu_hotplug.c | 6 +-
src/qemu/qemu_process.c | 44 +++++++------
src/qemu/qemu_process.h | 7 +-
tests/testutilsqemu.c | 5 +-
12 files changed, 221 insertions(+), 68 deletions(-)
--
2.34.1
