7.11 (x86 Only) IOStat Stays at 100% Util for Oracle Linux Virtual Machines After a Storage Migration

When a virtual machine running a kernel prior to UEK 3.8.13-68.2.1 is migrated from a local repository using the 'live migrate with storage' option, and all IO has been terminated, the IOStat on the virtual machine remains stuck at 100% Util.

This is related to a kernel bug where a call to the Xen blkfront driver caused the IO statistics to not be properly refreshed after a migration was completed, causing the accounting to fall out of sync with actual IO activity.

Workaround: This bug is resolved in UEK 3.8.13-68.2.1 and greater. To avoid this issue, upgrade the kernel used by your virtual machine.

Bug 21614184