Adam Litke has submitted this change and it was merged. Change subject: vdsm xml rpc: fix locking ...................................................................... vdsm xml rpc: fix locking Multiple threads will call concurrently the hypervisor interface. Without proper locking, we will have races. The most noticeable effect is an unbounded amount of calls to VDSM, due to the raceful age check. This completely defeats the purpose of caching. This patch adds a lock to make sure the check is safe, and that the caching is effective. Change-Id: I8a6d058ee2631bd100153c2091400a2a35b4fb1d Signed-off-by: Francesco Romani <fromani(a)redhat.com&gt; Reviewed-on: https://gerrit.ovirt.org/42574 Reviewed-by: Martin Sivák <msivak(a)redhat.com&gt; Continuous-Integration: Jenkins CI --- M mom/HypervisorInterfaces/vdsmxmlrpcInterface.py 1 file changed, 8 insertions(+), 4 deletions(-) Approvals: Martin Sivák: Looks good to me, approved Jenkins CI: Passed CI tests Francesco Romani: Verified -- To view, visit https://gerrit.ovirt.org/42574 To unsubscribe, visit https://gerrit.ovirt.org/settings Gerrit-MessageType: merged Gerrit-Change-Id: I8a6d058ee2631bd100153c2091400a2a35b4fb1d Gerrit-PatchSet: 2 Gerrit-Project: mom Gerrit-Branch: master Gerrit-Owner: Francesco Romani <fromani(a)redhat.com&gt; Gerrit-Reviewer: Adam Litke <alitke(a)redhat.com&gt; Gerrit-Reviewer: Francesco Romani <fromani(a)redhat.com&gt; Gerrit-Reviewer: Jenkins CI Gerrit-Reviewer: Martin Sivák <msivak(a)redhat.com&gt; Gerrit-Reviewer: automation(a)ovirt.org