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Make sure qemudDomainSetVcpus doesn't hang.

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The code to add job support into libvirtd caused a problem
in qemudDomainSetVcpus.  In particular, a qemuDomainObjEndJob()
call was added at the end of the function, but a
corresponding qemuDomainObjBeginJob() was not.  Additionally,
a call to qemuDomainObj{Enter,Exit}Monitor() was also missed
in qemudDomainHotplugVcpus().  These missing calls conspired to
cause a hang in the libvirtd process after the command was
finished.  Fix this by adding the missing calls.

Signed-off-by: Chris Lalancette <clalance@redhat.com>
This commit is contained in:
Chris Lalancette 2010-03-10 15:52:39 -05:00
parent 8a7f4b8dc1
commit 2c555d87b0
1 changed files with 9 additions and 2 deletions
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11
src/qemu/qemu_driver.c
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@ -4514,7 +4514,9 @@ static int qemudDomainHotplugVcpus(virDomainObjPtr vm, unsigned int nvcpus)
if (nvcpus > vm->def->vcpus) {
for (i = vm->def->vcpus ; i < nvcpus ; i++) {
/* Online new CPU */
qemuDomainObjEnterMonitor(vm);
rc = qemuMonitorSetCPU(priv->mon, i, 1);
qemuDomainObjExitMonitor(vm);
if (rc == 0)
goto unsupported;
if (rc < 0)
@ -4525,7 +4527,9 @@ static int qemudDomainHotplugVcpus(virDomainObjPtr vm, unsigned int nvcpus)
} else {
for (i = vm->def->vcpus - 1 ; i >= nvcpus ; i--) {
/* Offline old CPU */
qemuDomainObjEnterMonitor(vm);
rc = qemuMonitorSetCPU(priv->mon, i, 0);
qemuDomainObjExitMonitor(vm);
if (rc == 0)
goto unsupported;
if (rc < 0)
@ -4558,18 +4562,21 @@ static int qemudDomainSetVcpus(virDomainPtr dom, unsigned int nvcpus) {
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (qemuDomainObjBeginJob(vm) < 0)
goto cleanup;
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
goto endjob;
}
if (!virDomainObjIsActive(vm)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto cleanup;
goto endjob;
}
if (!(type = virDomainVirtTypeToString(vm->def->virtType))) {