Detecting special handling metadata using address verification

A non-transitory computer-readable storage medium comprising instructions that, when executed by a processing device, cause the processing device to:

• receive a read request directed to an addressable unit of memory, wherein the read request includes an address for the addressable unit and the addressable unit includes a metadata portion;
• detect a mismatch between one or more bits of the address in the read request and a corresponding one or more bits of an address verification value in the metadata portion of the addressable unit;
• determine that a position of each of the one or more bits that did not match is an indication of special handling for the addressable unit of memory;
• and
• in response to the indication of special handling:
• read special handling metadata for the addressable unit of memory, and
• process the read request according to the special handling metadata.

A system comprising:

• a memory device;
• and
• a processing device, operatively coupled with the memory device, to:
• receive a read request directed to an addressable unit of memory, wherein the read request includes an address for the addressable unit and the addressable unit includes a metadata portion;
• detect a mismatch between one or more bits of the address in the read request and a corresponding one or more bits of an address verification value in the metadata portion of the addressable unit;
• determine that a position of each of the one or more bits that did not match is an indication of special handling for the addressable unit of memory, wherein the special handling indicates at least a portion of the addressable unit of memory (1) was deallocated, (2) was subject to a prior error correction failure, or (3) remains unwritten;
• and
• in response to the indication of special handling:
• read special handling metadata for the addressable unit of memory, and
• process the read request according to the special handling metadata.