Memory management

Abstract

Apparatus, systems, and methods to manage memory operations are described. In one embodiment, an electronic device comprises a processor and a memory control logic to retrieve a global sequence number from a memory device, receive a read request for data stored in a logical block address in the memory device, retrieve a media sequence number from the logical block address in the memory device, and return a null response in lieu of the data stored in the logical block address when the media sequence number is older than the global sequence number. Other embodiments are also disclosed and claimed.

1 . A memory controller comprising logic to:
 retrieve a global sequence number from a memory device;   receive a read request for data stored in a logical block address in the memory device;   retrieve a media sequence number from the logical block address in the memory device; and   return a null response in lieu of the data stored in the logical block address when the media sequence number is older than the global sequence number.   
     
     
         2 . The memory controller of  claim 1 , further comprising logic to:
 return a response comprising the data stored in the logical block address in the memory device when the media sequence is not older than the global sequence number.   
     
     
         3 . The memory controller of  claim 1 , further comprising logic to:
 receive a write request to write data to a logical block address in the memory device; and   store the global sequence number into metadata associated with the requested logical block address as a media sequence number.   
     
     
         4 . The memory controller of  claim 1 , further comprising logic to:
 receive a zero memory request, and in response to the zero memory command:
 increment the global sequence number; and 
 store the global sequence number in the memory device. 
   
     
     
         5 . The memory controller of  claim 1 , wherein:
 the global sequence number comprises a global sequence series number which identifies a series to which the global sequence number belongs; and   the media sequence number comprises a media sequence series number which identifies a series to which the media sequence number belongs.   
     
     
         6 . The memory controller of  claim 5 , further comprising logic to:
 return a null response in lieu of the data stored in the logical block address when:
 the media sequence series number is equal to the global sequence serial number; and 
 the media sequence number is less than the global sequence number. 
   
     
     
         7 . The memory controller of  claim 5 , further comprising logic to:
 return a response comprising the data stored in the logical block address in the memory device when:
 the media sequence series number is equal to the global sequence serial number; and 
 the media sequence number is less than the global sequence number. 
   
     
     
         8 . The memory controller of  claim 5 , further comprising logic to:
 return a null response in lieu of the data stored in the logical block address when the media sequence serial number is not equal to the global sequence serial number.   
     
     
         9 . An electronic device comprising:
 a processor; and   a memory control logic to:
 retrieve a global sequence number from a memory device; 
 receive a read request for data stored in a logical block address in the memory device; 
 retrieve a media sequence number from the logical block address in the memory device; and 
 return a null response in lieu of the data stored in the logical block address when the media sequence number is older than the global sequence number. 
   
     
     
         10 . The electronic device of  claim 9 , wherein the memory controller further comprises logic to:
 receive, from a device, a request for the data; and   generate, in response to the request from the device, a request for the data from the remote memory device.   
     
     
         11 . The electronic device of  claim 10 , wherein the memory controller further comprises logic to:
 return a response comprising the data stored in the logical block address in the memory device when the media sequence is not older than the global sequence number.   
     
     
         12 . The electronic device of  claim 9 , wherein the memory controller further comprises logic to:
 receive a write request to write data to a logical block address in the memory device; and   store the global sequence number into metadata associated with the requested logical block address as a media sequence number.   
     
     
         13 . The electronic device of  claim 9 , wherein the memory controller further comprises logic to:
 receive a zero memory request, and in response to the zero memory command:
 increment the global sequence number; and 
 store the global sequence number in the memory device. 
   
     
     
         14 . The electronic device of  claim 9 , wherein:
 the global sequence number comprises a global sequence series number which identifies a series to which the global sequence number belongs; and   the media sequence number comprises a media sequence series number which identifies a series to which the media sequence number belongs.   
     
     
         15 . The electronic device of  claim 14 , wherein the memory controller further comprises logic to:
 return a null response in lieu of the data stored in the logical block address when:
 the media sequence serial number is equal to the global sequence serial number; and 
 the media sequence number is less than the global sequence number. 
   
     
     
         16 . The electronic device of  claim 14 , wherein the memory controller further comprises logic to:
 return a response comprising the data stored in the logical block address in the memory device when:
 the media sequence serial number is equal to the global sequence serial number; and 
 the media sequence number is less than the global sequence number. 
   
     
     
         17 . The electronic device of  claim 14 , wherein the memory controller further comprises logic to:
 return a null response in lieu of the data stored in the logical block address when the media sequence serial number is not equal to the global sequence serial number.   
     
     
         18 . A computer program product comprising logic instructions stored in a non-transitory computer readable medium which, when executed by a processor, configure the processor to:
 retrieve a global sequence number from a memory device;   receive a read request for data stored in a logical block address in the memory device;   retrieve a media sequence number from the logical block address in the memory device; and   return a null response in lieu of the data stored in the logical block address when the media sequence number is older than the global sequence number.   
     
     
         19 . The computer program product of  claim 18 , further comprising logic instructions stored in a non-transitory computer readable medium which, when executed by a processor, configure the processor to:
 return a response comprising the data stored in the logical block address in the memory device when the media sequence is not older than the global sequence number.   
     
     
         20 . The computer program product of  claim 18 , further comprising logic instructions stored in a non-transitory computer readable medium which, when executed by a processor, configure the processor to:
 receive a write request to write data to a logical block address in the memory device; and   store the global sequence number into metadata associated with the requested logical block address as a media sequence number.   
     
     
         21 . The computer program product of  claim 18 , further comprising logic instructions stored in a non-transitory computer readable medium which, when executed by a processor, configure the processor to:
 receive a zero memory request, and in response to the zero memory command:
 increment the global sequence number; and 
 store the global sequence number in the memory device. 
   
     
     
         22 . The computer program product of  claim 18 , wherein:
 the global sequence number comprises a global sequence series number which identifies a series to which the global sequence number belongs; and   the media sequence number comprises a media sequence series number which identifies a series to which the media sequence number belongs.   
     
     
         23 . The computer program product of  claim 22 , further comprising logic instructions stored in a non-transitory computer readable medium which, when executed by a processor, configure the processor to:
 return a null response in lieu of the data stored in the logical block address when:
 the media sequence serial number is equal to the global sequence serial number; and 
 the media sequence number is less than the global sequence number. 
   
     
     
         24 . The computer program product of  claim 22 , further comprising logic instructions stored in a non-transitory computer readable medium which, when executed by a processor, configure the processor to:
 return a response comprising the data stored in the logical block address in the memory device when:
 the media sequence serial number is equal to the global sequence serial number; and 
 the media sequence number is less than the global sequence number. 
   
     
     
         25 . The computer program product of  claim 22 , further comprising logic instructions stored in a non-transitory computer readable medium which, when executed by a processor, configure the processor to:
 return a null response in lieu of the data stored in the logical block address when the media sequence serial number is not equal to the global sequence serial number.