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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Daniel Henrique Barboza 0ccceaa57c qemu_validate.c: add pSeries NVDIMM size alignment validation
The existing auto-align behavior for pSeries has the idea to
alleviate user configuration of the NVDIMM size, given that the
alignment calculation is not trivial to do (256MiB alignment
of mem->size - mem->label_size value, a.k.a guest area). We
align mem->size down to avoid end of file problems.

The end result is not ideal though. We do not touch the domain
XML, meaning that the XML can report a NVDIMM size 255MiB smaller
than the actual size the guest is seeing. It also adds one more
thing to consider in case the guest is reporting less memory
than declared, since the auto-align is transparent to the
user.

Following Andrea's suggestion in [1], let's instead do an
size alignment validation. If the NVDIMM is unaligned, error out
and suggest a rounded up value. This can be bothersome to users,
but will bring consistency of NVDIMM size between the domain XML
and the guest.

This approach will force existing non-running pSeries guests to
readjust the NVDIMM value in their XMLs, if necessary. No changes
were made for x86 NVDIMM support.

[1] https://www.redhat.com/archives/libvir-list/2020-July/msg01471.html

Suggested-by: Andrea Bolognani <abologna@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
2020-08-24 18:41:28 +02:00
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.github github: skip lockdown of old issues/prs 2020-04-07 17:50:54 +01:00
build-aux build-aux: Get rid of 'make syntax-check' reference 2020-08-17 08:49:59 +02:00
ci ci/Makefile: get rid of 'make check' references 2020-08-17 08:42:47 +02:00
docs manpages/virsh: A couple of small clarifications 2020-08-24 18:15:36 +02:00
examples examples: Use GLib event loop impl in events.stp 2020-08-21 11:34:23 +01:00
include meson: add include directory 2020-08-03 09:26:59 +02:00
po qemu: Extract snapshot related code to a separate file 2020-08-24 16:42:29 +02:00
scripts scripts: Fix meson-install-symlink.py overwriting existing links 2020-08-05 13:11:16 +02:00
src qemu_validate.c: add pSeries NVDIMM size alignment validation 2020-08-24 18:41:28 +02:00
tests qemu_validate.c: add pSeries NVDIMM size alignment validation 2020-08-24 18:41:28 +02:00
tools virshStreamInData: Handle block devices 2020-08-24 13:39:55 +02:00
.color_coded.in gnulib: delete all gnulib integration 2020-02-07 15:03:54 +00:00
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.gitmodules gnulib: delete all gnulib integration 2020-02-07 15:03:54 +00:00
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.ycm_extra_conf.py.in gnulib: delete all gnulib integration 2020-02-07 15:03:54 +00:00
AUTHORS.in meson: generate and distribute spec files and AUTHORS 2020-08-03 09:27:06 +02:00
config.h config.h: add a copyright blurb 2020-08-03 13:54:15 +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
COPYING.LESSER
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
libvirt.pc.in
libvirt.spec.in README: Drop symlink 2020-08-24 09:32:08 +02:00
meson_options.txt meson: Improve RPATH handling 2020-08-24 12:58:51 +02:00
meson.build meson: Improve RPATH handling 2020-08-24 12:58:51 +02:00
mingw-libvirt.spec.in spec: Require Fedora 31 2020-06-17 12:59:08 +02:00
NEWS.rst news: Document sparse streams for block devices 2020-08-24 15:16:43 +02:00
README.rst README: drop Travis CI badge 2020-08-03 15:08:28 +02:00
run.in meson: generate run helper 2020-08-03 09:27:06 +02:00

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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