Re: [libvirt] [PATCH 3/4] domain_conf: Add support for iothreads in disk definition

Add a new disk "driver" attribute "iothread" to be parsed as the thread number for the disk to use. In order to more easily facilitate the usage and configuration of the iothread, a "zero" for the attribute indicates iothreads are not supported for the device and a positive value indicates the specific thread to try and use. Signed-off-by: John Ferlan <jferlan(a)redhat.com&gt; --- docs/formatdomain.html.in | 8 ++++++++ docs/schemas/domaincommon.rng | 13 +++++++++++++ src/conf/domain_conf.c | 24 +++++++++++++++++++++++- src/conf/domain_conf.h | 2 ++ 4 files changed, 46 insertions(+), 1 deletion(-) diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng index b4ac483..40891e4 100644 --- a/docs/schemas/domaincommon.rng +++ b/docs/schemas/domaincommon.rng @@ -1572,6 +1572,9 @@ <optional> <ref name="discard"/> </optional> + <optional> + <ref name="driverIOThread"/> + </optional> <empty/> </element> </define> @@ -1659,6 +1662,11 @@ </choice> </attribute> </define> + <define name="driverIOThread"> + <attribute name='iothread'> + <ref name="iothreadsid"/>

+ </attribute> + </define> <define name="controller"> <element name="controller"> <attribute name="index"> @@ -4759,6 +4767,11 @@ <param name="minInclusive">0</param> </data> </define> + <define name="iothreadsid"> + <data type="unsignedInt"> + <param name="pattern">[0-9]+</param> + </data> + </define> <define name="vcpuid"> <data type="unsignedShort"> <param name="pattern">[0-9]+</param> diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index 671c41c..b15f279 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c

@@ -11968,6 +11980,14 @@ virDomainDefParseXML(xmlDocPtr xml, goto error; } def->iothreads = count; + + /* Create a bitmap for inuse threads - noting that entries are + * numbered 1..def->iothreads since 0 (zero) iothreads means + * nothing and assigning a disk to an IOThread requires at least a + * thread# > 0 since a zero would indicate no IOThread for the disk + */ + if (!(def->iothreadmap = virBitmapNew(def->iothreads+1))) + goto error;