new interface to control emulator_period/emulator_quota

This patch adds two macros: VIR_DOMAIN_SCHEDULER_EMULATOR_PERIOD,
VIR_DOMAIN_SCHEDULER_EMULATOR_QUOTA for controlling cpu bandwidth
for emulator activities not tied to vcpus

include/libvirt/libvirt.h.in

@@ -679,18 +679,36 @@ typedef virTypedParameter *virTypedParameterPtr;
  * VIR_DOMAIN_SCHEDULER_VCPU_PERIOD:
  *
  * Macro represents the enforcement period for a quota, in microseconds,
- * when using the posix scheduler, as a ullong.
+ * for vcpus only, when using the posix scheduler, as a ullong.
  */
 #define VIR_DOMAIN_SCHEDULER_VCPU_PERIOD "vcpu_period"
 
 /**
  * VIR_DOMAIN_SCHEDULER_VCPU_QUOTA:
  *
- * Macro represents the maximum bandwidth to be used within a period,
- * when using the posix scheduler, as an llong.
+ * Macro represents the maximum bandwidth to be used within a period for
+ * vcpus only, when using the posix scheduler, as an llong.
  */
 #define VIR_DOMAIN_SCHEDULER_VCPU_QUOTA "vcpu_quota"
 
+/**
+ * VIR_DOMAIN_SCHEDULER_EMULATOR_PERIOD:
+ *
+ * Macro represents the enforcement period for a quota in microseconds,
+ * when using the posix scheduler, for all emulator activity not tied to
+ * vcpus, as a ullong.
+ */
+#define VIR_DOMAIN_SCHEDULER_EMULATOR_PERIOD "emulator_period"
+
+/**
+ * VIR_DOMAIN_SCHEDULER_EMULATOR_QUOTA:
+ *
+ * Macro represents the maximum bandwidth to be used within a period for
+ * all emulator activity not tied to vcpus, when using the posix scheduler,
+ * as an llong.
+ */
+#define VIR_DOMAIN_SCHEDULER_EMULATOR_QUOTA "emulator_quota"
+
 /**
  * VIR_DOMAIN_SCHEDULER_WEIGHT:
  *

tools/virsh.pod

@@ -1202,7 +1202,8 @@ available for each hypervisor are:
 
 LXC (posix scheduler) : cpu_shares
 
-QEMU/KVM (posix scheduler): cpu_shares, vcpu_period, vcpu_quota
+QEMU/KVM (posix scheduler): cpu_shares, vcpu_period, vcpu_quota,
+emulator_period, emulator_quota
 
 Xen (credit scheduler): weight, cap
 
@@ -1220,10 +1221,10 @@ values 0 and 1 are automatically converted to a minimal value of 2.
 B<Note>: The weight and cap parameters are defined only for the
 XEN_CREDIT scheduler and are now I<DEPRECATED>.
 
-B<Note>: The vcpu_period parameter has a valid value range of 1000-1000000 or
-0, and the vcpu_quota parameter has a valid value range of
-1000-18446744073709551 or less than 0. The value 0 for either parameter is
-the same as not specifying that parameter.
+B<Note>: The vcpu_period/emulator_period parameters have a valid value range
+of 1000-1000000 or 0, and the vcpu_quota/emulator_quota parameters have a
+valid value range of 1000-18446744073709551 or less than 0. The value 0 for
+either parameter is the same as not specifying that parameter.
 
 =item B<screenshot> I<domain> [I<imagefilepath>] [I<--screen> B<screenID>]