System and method for refreshing data for integrity protection at a thermal excursion event
An information handling system includes a memory array and a memory controller. The memory array stores data within the information handling system. The memory controller writes the data to the memory array. The memory controller also determines whether a temperature of the memory array is above a threshold temperature. The memory controller tags a plurality of memory locations within the memory array written with data while the temperature is above the threshold temperature. While a refresh operation is being executed, the memory controller determines whether the temperature of the memory array is below the threshold temperature. In response to the temperature of the memory array being below the threshold temperature and while the refresh operation is being executed, the memory controller rewrites the data in the tagged memory locations within the memory array.
1. An information handling system, comprising:
a memory array of a memory device, the memory array to store data within the information handling system;
a memory buffer to temporary store the data for the memory array; and
a memory controller to communicate with the memory array, the memory controller to:
write the data to the memory array;
determine whether a temperature of the memory array is above a threshold temperature;
tag a plurality of memory locations within the memory array written with data while the temperature is above the threshold temperature; and
determine whether a capacity of the memory buffer is above a threshold capacity, wherein the memory buffer is located within the memory controller;
in response to the capacity of the memory buffer is above the threshold capacity, execute a refresh operation; and
while the refresh operation is being executed, the memory controller to:
determine whether the temperature of the memory array is below the threshold temperature; and
in response to the temperature of the memory array being below the threshold temperature, rewrite the data in the tagged memory locations within the memory array.
2. The information handling system of claim 1 , further comprising:
a thermal sensor associated with the memory array,
wherein prior to determination of whether the temperature of the memory array is above the threshold temperature, the memory controller to receive the temperature of the memory array from the thermal sensor.
3. The information handling system of claim 2 , wherein the thermal sensor is located at one of a plurality of locations including within a board including the memory controller and memory array, within a memory controller package, and within a memory array package.
4. The information handling system of claim 1 , wherein the tagging of the memory locations includes the memory controller further to:
store metadata for the memory locations indicating that the data was written while the temperature was above the threshold temperature.
5. The information handling system of claim 1 , wherein in response to the refresh operation being completed, the memory controller to flush at least a portion of the memory buffer.
6. The information handling system of claim 1 , wherein the tagging of the memory locations includes the memory controller further to:
set a plurality of fields within a controller memory, wherein each of the fields is associated with a different one of the memory locations written while the temperature was above the threshold temperature.
7. The information handling system of claim 1 , wherein the memory controller further to:
determine whether a garbage collection operation is being executed; and
in response to the garbage collection operation being executed, determine that the refresh operation is being executed.
8. A method, comprising:
writing, by a memory controller of an information handling system, data to a memory array of the information handling system;
determining, by the memory controller, whether a temperature of the memory array is above a threshold temperature;
tagging a plurality of memory locations within the memory array written with data while the temperature is above the threshold temperature;
determining whether a capacity of a memory buffer is above a threshold capacity, wherein the memory buffer is located within the memory controller;
in response to the capacity of the memory buffer being above the threshold capacity, executing a refresh operation; and
while the refresh operation is being executed, rewriting the data in the tagged memory locations within the memory array if the temperature of the memory array is below the threshold temperature.
9. The method of claim 8 , wherein the tagging of the memory locations further comprises:
storing metadata for the memory locations indicating that the data was written while the temperature was above the threshold temperature.
10. The method of claim 8 , wherein the tagging of the memory locations further comprises:
setting a plurality of fields within a controller memory, wherein each of the fields is associated with a different one of the memory locations written while the temperature was above the threshold temperature.
11. The method of claim 8 , further comprising:
determining whether a garbage collection operation is being executed; and
in response to the garbage collection operation being executed, determining that the refresh operation is being executed.
12. The method of claim 8 , further comprising:
in response to the refresh operation being completed, flushing at least a portion of the memory buffer.
13. The method of claim 8 , further comprising:
prior to the determining of whether the temperature of the memory array is above the threshold temperature, receiving, by the memory controller, the temperature of the memory array from a thermal sensor associated with the memory array.
14. The method of claim 8 , wherein the memory array is a flash memory array.
15. An information handling system, comprising:
a memory array of a memory device, the memory array to store data within the information handling system;
a thermal sensor to measure temperatures associated with the memory array;
a memory buffer to temporary store the data for the memory array; and
a memory controller to;
write the data to the memory array;
receive, from the thermal sensor, a temperature of the memory array;
determine whether the temperature of the memory array is above a threshold temperature;
tag a plurality of memory locations within the memory array written with data while the temperature is above the threshold temperature;
determine whether a capacity of the memory buffer is above a threshold capacity, wherein the memory buffer is located within the memory controller;
in response to the capacity of the memory buffer being above the threshold capacity, execute a refresh operation; and
while the refresh operation is being executed and if the temperature of the memory array is below the threshold temperature, then rewrite the data in the tagged memory locations within the memory array, wherein the data is stored in the memory buffer to be flushed during the refresh operation.
16. The information handling system of claim 15 , wherein the tagging of the memory locations includes the memory controller further to:
store metadata for the memory locations indicating that the data was written while the temperature was above the threshold temperature.
17. The information handling system of claim 15 , wherein the tagging of the memory locations includes the memory controller further to:
set a plurality of fields within a controller memory, wherein each of the fields is associated with a different one of the memory locations written while the temperature was above the threshold temperature.
18. The information handling system of claim 15 , wherein the memory controller further to:
determine whether a garbage collection operation is being executed; and
in response to the garbage collection operation being executed, determine that the refresh operation is being executed.