[libvirt] [PATCH 0/3] qemu: support -overcommit cpu-pm=on|off

Menno Lageman posted 3 patches 13 weeks ago
Test syntax-check passed
Patches applied successfully (tree, apply log)
git fetch https://github.com/patchew-project/libvirt tags/patchew/20190819083226.28640-1-menno.lageman@oracle.com
docs/formatdomain.html.in                     |  7 ++++
docs/schemas/domaincommon.rng                 |  5 +++
src/conf/domain_conf.c                        |  4 ++
src/conf/domain_conf.h                        |  1 +
src/libvirt_private.syms                      |  1 +
src/qemu/qemu_command.c                       | 39 +++++++++++++++++--
src/qemu/qemu_domain.c                        | 25 ++++++++----
tests/qemuxml2argvdata/kvm-features-off.args  |  2 +-
tests/qemuxml2argvdata/kvm-features-off.xml   |  1 +
tests/qemuxml2argvdata/kvm-features.args      |  2 +-
tests/qemuxml2argvdata/kvm-features.xml       |  1 +
tests/qemuxml2argvtest.c                      |  4 +-
tests/qemuxml2xmloutdata/kvm-features-off.xml |  1 +
tests/qemuxml2xmloutdata/kvm-features.xml     |  1 +
14 files changed, 79 insertions(+), 15 deletions(-)

[libvirt] [PATCH 0/3] qemu: support -overcommit cpu-pm=on|off

Posted by Menno Lageman 13 weeks ago
QEMU introduced a CPU power management feature with commit 6f131f13e68d
("kvm: support -overcommit cpu-pm=on|off").

With this flag, kvm allows guest to control host CPU power state.  This
increases latency for other processes using same host CPU in an
unpredictable way, but if decreases idle entry/exit times for the
running VCPU, so to use it QEMU needs a hint about whether host CPU is
overcommitted, hence the flag name.

This patch series adds a new kvm feature 'cpu-pm' for controlling
"-overcommit cpu-pm=[on|off]"

    <features>
      <kvm>
        <cpu-pm state='on'/>
      </kvm>
    </features>


Menno Lageman (2):
  qemu: introduce qemuBuildOvercommitCommandLine()
  tests: add tests for cpu-pm feature

Wim ten Have (1):
  qemu: add hypervisor feature cpu-pm support for kvm

 docs/formatdomain.html.in                     |  7 ++++
 docs/schemas/domaincommon.rng                 |  5 +++
 src/conf/domain_conf.c                        |  4 ++
 src/conf/domain_conf.h                        |  1 +
 src/libvirt_private.syms                      |  1 +
 src/qemu/qemu_command.c                       | 39 +++++++++++++++++--
 src/qemu/qemu_domain.c                        | 25 ++++++++----
 tests/qemuxml2argvdata/kvm-features-off.args  |  2 +-
 tests/qemuxml2argvdata/kvm-features-off.xml   |  1 +
 tests/qemuxml2argvdata/kvm-features.args      |  2 +-
 tests/qemuxml2argvdata/kvm-features.xml       |  1 +
 tests/qemuxml2argvtest.c                      |  4 +-
 tests/qemuxml2xmloutdata/kvm-features-off.xml |  1 +
 tests/qemuxml2xmloutdata/kvm-features.xml     |  1 +
 14 files changed, 79 insertions(+), 15 deletions(-)

-- 
2.21.0

--
libvir-list mailing list
libvir-list@redhat.com
https://www.redhat.com/mailman/listinfo/libvir-list