Fast virtual machine storage allocation with encrypted storage

A system comprising:

• a memory device;
• and
• a processing device executing a hypervisor, coupled to the memory, wherein the processing device is to:
• receive a request to allocate storage to a first virtual machine;
• select, by the hypervisor, a storage block from a plurality of storage blocks, the selected storage block to be allocated to the first virtual machine;
• determine that the selected storage block contains encrypted content;
• and
• allocate the selected storage block containing the encrypted content to the first virtual machine.

A non-transitory device-readable medium storing instructions that, when executed by a processing device executing a hypervisor, cause the processing device to perform operations comprising:

• receiving an indication that a storage block contains encrypted content, the storage block being released by a first virtual machine;
• adding, by the hypervisor, an identifier of the storage block to a set of storage block identifiers, wherein each storage block identifier in the set is associated with a storage block containing encrypted content;
• receiving a request to allocate storage to a second virtual machine;
• selecting, by the hypervisor, a storage block identifier from the set of storage block identifiers to identify a particular storage block to allocate to the second virtual machine;
• and
• allocating the particular storage block containing the encrypted content to the second virtual machine.