Re: [libvirt] [PATCH v2 1/4] domain_conf: Introduce iothreads XML

Introduce XML to allowing adding iothreads to the domain. These can be used by virtio-blk-pci devices in order to assign a specific thread to handle the workload for the device. The iothreads are the official implementation of the virtio-blk Data Plane that's been in tech preview for QEMU. Signed-off-by: John Ferlan <jferlan(a)redhat.com&gt; --- docs/formatdomain.html.in | 26 ++++++++++++++++++++++++++ docs/schemas/domaincommon.rng | 6 ++++++ src/conf/domain_conf.c | 20 ++++++++++++++++++++ src/conf/domain_conf.h | 2 ++ 4 files changed, 54 insertions(+) diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in index de4e4eb..b584a08 100644 --- a/docs/formatdomain.html.in +++ b/docs/formatdomain.html.in @@ -470,6 +470,32 @@ </dd> </dl> + <h3><a name="elementsIOThreadsAllocation">IOThreads Allocation</a></h3> + <p> + IOThreads are a QEMU feature that will allow supported disk + devices to be configured to use a dedicated event loop thread + to handle block I/O requests. + <span class="since">Since 1.2.8 (QEMU only)</span> + </p>

diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index dd512ca..81a3fdf 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -11957,6 +11957,15 @@ virDomainDefParseXML(xmlDocPtr xml, } } + /* Optional - iothreads */ + tmp = virXPathString("string(./iothreads[1])", ctxt); + if (tmp && virStrToLong_uip(tmp, NULL, 0, &def->iothreads) < 0) {