Performing error correction in computer memory

An apparatus for performing error correction in computer memory, the apparatus comprising memory firmware and a mark table, the apparatus configured to carry out the steps of:

• receiving, by the memory firmware, a read request targeting a read address within the computer memory;
• accessing, by the memory firmware, the mark table comprising a plurality of entries, each entry corresponding to a detected error at a memory address in a physical location of computer memory, each entry including a field specifying a region size, a field specifying a match address, and a field specifying a mark location;
• performing, by the memory firmware, a lookup of the mark table using the read address including, for each entry in the mark table:
• generating a mask based on the region size stored in the entry;
• determining, based on the mask, whether the read address is within a memory region specified by the match address and region size stored in the entry;
• and
• if the read address is within the memory region specified by the match address and region size stored in the entry, performing error correction using the mark location stored in the entry.

A computer program product for performing error correction in computer memory, the computer program product disposed upon a computer readable storage medium, the computer program product configured to carry out the steps of:

• receiving a read request targeting a read address within the computer memory;
• accessing a mark table comprising a plurality of entries, each entry corresponding to a detected error at a memory address in a physical location of computer memory, each entry including a field specifying a region size, a field specifying a match address, and a field specifying a mark location;
• performing a lookup of the mark table using the read address including, for each entry in the mark table:
• generating a mask based on the region size stored in the entry;
• determining, based on the mask, whether the read address is within a memory region specified by the match address and region size stored in the entry;
• and
• if the read address is within the memory region specified by the match address and region size stored in the entry, performing error correction using the mark location stored in the entry.