Re: [libvirt] [PATCH 2/2] qemu: New XML to disable memory merge at guest startup

QEMU introduced command line "-mem-merge=on|off" (defaults to on) to enable/disable the memory merge (KSM) at guest startup. This exposes it by new XML: <memoryBacking> <nosharepages/> </memoryBacking> The XML tag is same with what we used internally for old RHEL. --- docs/formatdomain.html.in | 13 ++++++--- docs/schemas/domaincommon.rng | 5 ++++ src/conf/domain_conf.c | 20 +++++++++----- src/conf/domain_conf.h | 1 + src/qemu/qemu_command.c | 22 +++++++++++++++ tests/qemuargv2xmltest.c | 2 ++ .../qemuxml2argv-nosharepages.args | 4 +++ .../qemuxml2argvdata/qemuxml2argv-nosharepages.xml | 31 ++++++++++++++++++++++ tests/qemuxml2argvtest.c | 1 + tests/qemuxml2xmltest.c | 1 + 10 files changed, 90 insertions(+), 10 deletions(-) create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-nosharepages.args create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-nosharepages.xml diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in index 9ade507..3a6c18f 100644 --- a/docs/formatdomain.html.in +++ b/docs/formatdomain.html.in @@ -561,6 +561,7 @@ ... &lt;memoryBacking&gt; &lt;hugepages/&gt; + &lt;nosharepages/&gt; &lt;/memoryBacking&gt; ... &lt;/domain&gt; @@ -568,10 +569,14 @@ <dl> <dt><code>memoryBacking</code></dt> - <dd>The optional <code>memoryBacking</code> element, may have an - <code>hugepages</code> element set within it. This tells the - hypervisor that the guest should have its memory allocated using - hugepages instead of the normal native page size.</dd> + <dd>The optional <code>memoryBacking</code> element has two + optional elements. The element <code>hugepages</code> tells + the hypervisor that the guest should have its memory allocated + using hugepages instead of the normal native page size. And the + optional element <code>nosharepages</code> tells the hypervisor + that share pages (memory merge, KSM) should be disabled on guest + startup. + </dd> </dl>