Libvirt provides a portable, long term stable C API for managing the virtualization technologies provided by many operating systems. It includes support for QEMU, KVM, Xen, LXC, bhyve, Virtuozzo, VMware vCenter and ESX, VMware Desktop, Hyper-V, VirtualBox and the POWER Hypervisor.
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Pavel Hrdina 8b118c909a Revert "qemuDomainSetNumaParamsLive: set nodeset for root cgroup"
This reverts commit <1b22dd6dd44202094e0f78f887cbe790c00e9ebc>.

First of all, the reverted commit is incomplete. It only sets
cpuset.mems in the VM root cgroup when the API is used but there is no
code that would do the same when the VM is started.

Libvirt never places any process into the VM root cgroup directly. All
the supporting processes like slirp-helper or dbus-daemon are placed
into the emulator sub-cgroup and all the QEMU threads are distributed
between emulator, vcpu* and iothread* sub-cgroups. The scenario
described in the reverted commit can happen only if someone manually
adds any process there which we should not care about.

If we would like to set the limit in the VM root cgroup we need to
introduce better logic:

    - set both (old and new) numa group in the VM root cgroup
    - change the numa group in all sub-cgroups to new value
    - finally set only the new value in the VM root cgroup

The simplest fix now is to revert the commit.

Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
2021-05-24 14:31:42 +02:00
.ctags.d maint: Add support for .ctags.d 2019-05-31 17:54:28 +02:00
.github github: skip lockdown of old issues/prs 2020-04-07 17:50:54 +01:00
.gitlab/issue_templates gitlab: Add issue template for a feature request 2020-12-02 09:11:27 +01:00
build-aux Remove test 'args' file rewrapping infrastructure 2021-04-12 15:55:10 +02:00
ci gitlab: avoid building libvirt twice and running syntax-check twice 2021-05-12 14:18:15 +01:00
docs kbase: Fix broken link of migration doc 2021-05-24 12:47:15 +02:00
examples nodedev: add DEFINED/UNDEFINED lifecycle events 2021-04-07 15:07:45 -05:00
include lib: Add win-dmp crashdump format 2021-05-20 16:23:32 +02:00
po Translated using Weblate (Swedish) 2021-05-10 15:31:59 +02:00
scripts lib: Drop internal virXXXPtr typedefs 2021-04-13 17:00:38 +02:00
src Revert "qemuDomainSetNumaParamsLive: set nodeset for root cgroup" 2021-05-24 14:31:42 +02:00
tests qemu: Build command line for object input-linux 2021-05-21 14:29:09 +02:00
tools virsh: Expose new win-dmp dump format 2021-05-20 16:24:06 +02:00
.color_coded.in gnulib: delete all gnulib integration 2020-02-07 15:03:54 +00:00
.ctags ctags: Generate tags for headers, i.e. function prototypes 2018-09-18 14:21:33 +02:00
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config.h meson: Declare GLIB_VERSION_* macros at configure 2021-05-03 12:08:26 +02:00
configmake.h.in meson: generate configmake.h 2020-08-03 09:26:48 +02:00
CONTRIBUTING.rst meson: adjust our documentation to mention meson instead of autoconf 2020-08-03 09:27:09 +02:00
COPYING maint: follow recommended practice for using LGPL 2013-05-20 14:15:21 -06:00
COPYING.LESSER maint: Remove control characters from LGPL license file 2015-09-25 09:16:24 +02:00
gitdm.config gitdm: add 'ibm' file 2019-10-18 17:32:52 +02:00
libvirt-admin.pc.in Add libvirt-admin library 2015-06-16 13:46:20 +02:00
libvirt-lxc.pc.in Add pkg-config files for libvirt-qemu & libvirt-lxc 2014-06-23 16:17:27 +01:00
libvirt-qemu.pc.in Add pkg-config files for libvirt-qemu & libvirt-lxc 2014-06-23 16:17:27 +01:00
libvirt.pc.in Add pkg-config files for libvirt-qemu & libvirt-lxc 2014-06-23 16:17:27 +01:00
libvirt.spec.in rpm: Set version information for libvirt-admin virtual name 2021-05-13 09:28:34 +02:00
meson_options.txt meson: Add documentation installation directory option 2021-03-09 12:13:38 +01:00
meson.build meson: Add yajl kludge 2021-05-18 15:19:47 +02:00
mingw-libvirt.spec.in spec: Simplify platform check 2021-05-12 10:29:45 +02:00
NEWS.rst NEWS: Document new memory dump format 2021-05-20 16:24:11 +02:00
README.rst README: drop Travis CI badge 2020-08-03 15:08:28 +02:00
run.in run: fix spawning of daemons 2021-04-07 11:41:26 +01:00

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Libvirt API for virtualization

Libvirt provides a portable, long term stable C API for managing the virtualization technologies provided by many operating systems. It includes support for QEMU, KVM, Xen, LXC, bhyve, Virtuozzo, VMware vCenter and ESX, VMware Desktop, Hyper-V, VirtualBox and the POWER Hypervisor.

For some of these hypervisors, it provides a stateful management daemon which runs on the virtualization host allowing access to the API both by non-privileged local users and remote users.

Layered packages provide bindings of the libvirt C API into other languages including Python, Perl, PHP, Go, Java, OCaml, as well as mappings into object systems such as GObject, CIM and SNMP.

Further information about the libvirt project can be found on the website:

https://libvirt.org

License

The libvirt C API is distributed under the terms of GNU Lesser General Public License, version 2.1 (or later). Some parts of the code that are not part of the C library may have the more restrictive GNU General Public License, version 2.0 (or later). See the files COPYING.LESSER and COPYING for full license terms & conditions.

Installation

Instructions on building and installing libvirt can be found on the website:

https://libvirt.org/compiling.html

Contributing

The libvirt project welcomes contributions in many ways. For most components the best way to contribute is to send patches to the primary development mailing list. Further guidance on this can be found on the website:

https://libvirt.org/contribute.html

Contact

The libvirt project has two primary mailing lists:

Further details on contacting the project are available on the website:

https://libvirt.org/contact.html