[libvirt] [PATCHv5 0/4] Add support for memory backing with file source

[Michal Privoznik]

On 02/02/2017 02:27 PM, Jaroslav Safka wrote:
> Hi,
> we would like to introduce 3 new elements source,access and allocation in memoryBacking element.
> For now it was made for numa topology.
> 
> <memoryBacking>
>      <source type="file|anonymous"/>
>      <access mode="shared|private"/>
>      <allocation mode="immediate|ondemand"/> 
> </memoryBacking>
> 
> If allocation is immediate then -mem-prealloc should be added to the qemu commanline.
> If source is file then
> -object memory-backend-file,id=mem,size=1024M,mem-path=*lib dir path* -numa node,memdev=mem Will be added to the qemu commandline
> 
> If access is shared then the "share=on" parameter will be added to the memory-backend-file e.g.
> -object memory-backend-file,id=mem,size=1024M,mem-path=/var/lib/libvirt/qemu,share=on
> 
> The access mode can be overriden by specifying token memAccess in numa cell.
> The mem-path can be defined by new config parameter memory_backing_dir.
> 
> PS: the sometime failing test qemuhotplug was failing also before this patch :)
> 
> Jaroslav Safka (4):
>   qemu,conf: Rename virNumaMemAccess to virDomainMemoryAccess
>   qemu_conf: Add param memory_backing_dir
>   conf: Add new xml elements for file memorybacking support
>   qemu: Add args generation for file memory backing
> 
>  docs/formatdomain.html.in                          |   9 ++
>  docs/schemas/domaincommon.rng                      |  30 +++++
>  src/conf/domain_conf.c                             | 133 ++++++++++++++++-----
>  src/conf/domain_conf.h                             |  22 ++++
>  src/conf/numa_conf.c                               |  15 +--
>  src/conf/numa_conf.h                               |  14 +--
>  src/qemu/libvirtd_qemu.aug                         |   3 +
>  src/qemu/qemu.conf                                 |   4 +
>  src/qemu/qemu_command.c                            |  55 ++++++---
>  src/qemu/qemu_conf.c                               |   9 ++
>  src/qemu/qemu_conf.h                               |   2 +
>  src/qemu/qemu_process.c                            |   2 +-
>  src/qemu/test_libvirtd_qemu.aug.in                 |   1 +
>  .../qemuxml2argv-fd-memory-no-numa-topology.args   |  21 ++++
>  .../qemuxml2argv-fd-memory-no-numa-topology.xml    |  27 +++++
>  .../qemuxml2argv-fd-memory-numa-topology.args      |  24 ++++
>  .../qemuxml2argv-fd-memory-numa-topology.xml       |  30 +++++
>  .../qemuxml2argv-fd-memory-numa-topology2.args     |  27 +++++
>  .../qemuxml2argv-fd-memory-numa-topology2.xml      |  31 +++++
>  .../qemuxml2argv-fd-memory-numa-topology3.args     |  30 +++++
>  .../qemuxml2argv-fd-memory-numa-topology3.xml      |  32 +++++
>  .../qemuxml2argv-memorybacking-set.xml             |  24 ++++
>  .../qemuxml2argv-memorybacking-unset.xml           |  24 ++++
>  tests/qemuxml2argvtest.c                           |  13 ++
>  .../qemuxml2xmlout-memorybacking-set.xml           |  32 +++++
>  .../qemuxml2xmlout-memorybacking-unset.xml         |  32 +++++
>  tests/qemuxml2xmltest.c                            |   3 +
>  27 files changed, 584 insertions(+), 65 deletions(-)
>  create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-fd-memory-no-numa-topology.args
>  create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-fd-memory-no-numa-topology.xml
>  create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-fd-memory-numa-topology.args
>  create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-fd-memory-numa-topology.xml
>  create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-fd-memory-numa-topology2.args
>  create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-fd-memory-numa-topology2.xml
>  create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-fd-memory-numa-topology3.args
>  create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-fd-memory-numa-topology3.xml
>  create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-memorybacking-set.xml
>  create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-memorybacking-unset.xml
>  create mode 100644 tests/qemuxml2xmloutdata/qemuxml2xmlout-memorybacking-set.xml
>  create mode 100644 tests/qemuxml2xmloutdata/qemuxml2xmlout-memorybacking-unset.xml
> 

Looking good. ACK to all of them. However, please send a patch (as a
reply to this cover letter) that updates docs/news.xml. Only after that
it is possible to push these.

Michal