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qemu: Reduce memlock limit after detaching PCI hostdev

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We increase the limit before plugging in a PCI hostdev or a memory
module because some memory might need to be locked due to eg. VFIO.

Of course we should do the opposite after unplugging a device: this
was already the case for memory modules, but not for PCI hostdevs.
This commit is contained in:
Andrea Bolognani 2015-11-18 13:56:09 +01:00
parent 65909c7996
commit b583e80cb8
1 changed files with 5 additions and 0 deletions
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5
src/qemu/qemu_hotplug.c
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@ -3051,6 +3051,10 @@ qemuDomainRemoveHostDevice(virQEMUDriverPtr driver,
switch ((virDomainHostdevSubsysType) hostdev->source.subsys.type) {
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI:
qemuDomainRemovePCIHostDevice(driver, vm, hostdev);
/* QEMU might no longer need to lock as much memory, eg. we just
* detached the last VFIO device, so adjust the limit here */
if (qemuDomainAdjustMaxMemLock(vm) < 0)
VIR_WARN("Failed to adjust locked memory limit");
break;
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB:
qemuDomainRemoveUSBHostDevice(driver, vm, hostdev);
@ -3076,6 +3080,7 @@ qemuDomainRemoveHostDevice(virQEMUDriverPtr driver,
networkReleaseActualDevice(vm->def, net);
virDomainNetDefFree(net);
}
ret = 0;
cleanup: