在 2021/11/22 16:50, Peter Krempa 写道:
On Sat, Nov 20, 2021 at 03:20:47 -0500, huangy81@chinatelecom.cn wrote:
From: Hyman Huang(黄勇) <huangy81@chinatelecom.cn>
introduce dirty_ring_size in struct "_virDomainDef" to hold the ring size configured by user, and pass dirty_ring_size when building qemu commandline if dirty ring feature enabled.
Signed-off-by: Hyman Huang(黄勇) <huangy81@chinatelecom.cn> --- src/conf/domain_conf.c | 76 ++++++++++++++++++++++++++++++++++++++++- src/conf/domain_conf.h | 4 +++ src/qemu/qemu_command.c | 3 ++ 3 files changed, 82 insertions(+), 1 deletion(-)
[...]
@@ -4826,6 +4827,18 @@ virDomainDefPostParseMemtune(virDomainDef *def) }
+static void +virDomainDefPostParseFeatures(virDomainDef *def) +{ + if (def->features[VIR_DOMAIN_FEATURE_KVM] == VIR_TRISTATE_SWITCH_ON && + def->kvm_features[VIR_DOMAIN_KVM_DIRTY_RING] == VIR_TRISTATE_SWITCH_ON && + def->dirty_ring_size == 0) { + /* set 4096 as default size if dirty ring size not congfigured */
Instead of this quite obvious thing I'd prefer a justification of why this setting is done in the global post-parse function rather than the qemu specific one. If there is no good reason to have it globally, please move it to the qemu-specific one. Ok, i'll move it into virDomainFeaturesKVMDefParse and parse it once for all
+ def->dirty_ring_size = 4096; + } +}
[...]
@@ -17566,8 +17581,10 @@ virDomainFeaturesHyperVDefParse(virDomainDef *def,
static int virDomainFeaturesKVMDefParse(virDomainDef *def, + xmlXPathContextPtr ctxt, xmlNodePtr node) { + xmlNodePtr tmp_node = ctxt->node;
We have an established approach for resetting the XPath context. Please use it, as ...[1]. Ok
def->features[VIR_DOMAIN_FEATURE_KVM] = VIR_TRISTATE_SWITCH_ON;
node = xmlFirstElementChild(node); @@ -17589,9 +17606,37 @@ virDomainFeaturesKVMDefParse(virDomainDef *def,
def->kvm_features[feature] = value;
+ /* dirty ring feature should parse size property */ + if ((virDomainKVM) feature == VIR_DOMAIN_KVM_DIRTY_RING) { + if (((virDomainKVM) feature) == VIR_DOMAIN_KVM_DIRTY_RING && + value == VIR_TRISTATE_SWITCH_ON) { + ctxt->node = node; + + if (virXMLPropString(node, "size")) {
virXMLPropString returns an allocated string, so this is leaking memory