Facilitating sequential reads in memory sub-systems
An example memory subsystem includes a memory component and a processing device, operatively coupled to the memory component. The processing device is configured to receive a plurality of logical-to-physical (L2P) records, wherein an L2P record of the plurality of L2P records maps a logical block address to a physical address of a memory block on the memory component; determine a sequential assist value specifying a number of logical block addresses that are mapped to consecutive physical addresses sequentially following the physical address specified by the L2P record; generate a security token encoding the sequential assist value; and associate the security token with the L2P record.
1. A system comprising:
a memory component; and
a processing device, operatively coupled to the memory component, the processing device to perform operations comprising:
receiving a plurality of logical-to-physical (L2P) records, wherein an L2P record of the plurality of L2P records maps a logical block address to a physical address of a memory block on the memory component;
determining a sequential assist value specifying a number of logical block addresses that are mapped to consecutive physical addresses sequentially following the physical address specified by the L2P record;
generating a security token encoding the sequential assist value;
associating the security token with the L2P record; and
transmitting, to a host system, a message comprising a Universal Flash Storage (UFS) Protocol Information Unit (UPIU), wherein the UPIU indicates a host performance boost (HPB) with sequential assist capability.
2. The system of claim 1 , wherein the operations further comprise:
responsive to receiving a request from a host system, transmitting at least a subset of the plurality of L2P records to the host system, wherein the subset includes the L2P record.
3. The system of claim 1 , wherein the security token further comprises:
an encoding of a power-on reset count.
4. The system of claim 1 , wherein the security token further comprises:
an encoding of a sub-region update count.
5. The system of claim 1 , wherein the operations further comprise:
receiving, from a host system, a read command specifying the logical block address, the physical address corresponding to the logical block address, and the sequential assist value; and
reading, from the memory component, a plurality of memory blocks having consecutive physical addresses, wherein a number of the memory blocks is less than or equal to the sequential assist value.
6. The system of claim 1 , wherein the memory component is a NAND type flash memory.
7. A non-transitory computer-readable storage medium comprising executable instructions which, when executed by a processing device of a controller, cause the processing device to perform operations, comprising:
receiving a plurality of logical-to-physical (L2P) records, wherein an L2P record of the plurality of L2P records maps a logical block address to a physical address of a memory block on a memory component managed by the controller;
determining a sequential assist value specifying a number of logical block addresses that are mapped to consecutive physical addresses sequentially following the physical address specified by the L2P record;
generating a security token encoding the sequential assist value;
associating the security token with the L2P record;
receiving, from a host system, a read command specifying the logical block address, the physical address corresponding to the logical block address, and the sequential assist value; and
reading, from the memory component, a plurality memory blocks having consecutive physical addresses, wherein a number of the memory blocks is less than or equal to the sequential assist value.
8. The non-transitory computer-readable storage medium of claim 7 , wherein the operations further comprise:
responsive to receiving a request from a host system, transmitting at least a subset of the plurality of L2P records to the host system, wherein the subset includes the L2P record.
9. The non-transitory computer-readable storage medium of claim 7 , wherein the security token further comprises:
an encoding of a power-on reset count.
10. The non-transitory computer-readable storage medium of claim 7 , wherein the security token further comprises:
an encoding of a sub-region update count.
11. The non-transitory computer-readable storage medium of claim 7 , wherein the operations further comprise:
transmitting, to a host system, a response comprising a Universal Flash Storage (UFS) Protocol Information Unit (UPIU), wherein the UPIU indicates a host performance boost (HPB) with sequential assist capability.
12. The non-transitory computer-readable storage medium of claim 7 , wherein the memory component is a NAND type flash memory.
13. A non-transitory computer-readable storage medium comprising executable instructions which, when executed by a processing device of a host system, cause the processing device to perform operations, comprising:
receiving a logical-to-physical (L2P) map comprising a first L2P record and a second L2P record, wherein the first L2P record specifies a first logical block address, a first physical address of a first memory block on a memory component, and a first sequential assist value specifying a number of logical block addresses that are mapped to consecutive physical addresses sequentially following the first physical address, and wherein the second L2P record specifies a second logical block address, a second physical address of a second memory block on the memory component, and a second sequential assist value specifying a number of logical block addresses that are mapped to consecutive physical addresses sequentially following the second physical address;
issuing, to a memory subsystem, a first read command to read a first plurality of blocks starting from the first logical block address, wherein the first plurality of blocks comprises a first number of blocks that exceeds the first sequential assist value; and
issuing, to a memory subsystem, a second read command to read a second plurality of blocks starting from the second logical block address, wherein the second plurality of blocks comprises a second number of blocks that is less than or equal to the second sequential assist value.
14. The non-transitory computer-readable storage medium of claim 13 , wherein the operations further comprise:
responsive to receiving, from the memory subsystem, a response comprising a Universal Flash Storage (UFS) Protocol Information Unit (UPIU) specifying an identifier of an active sub-region, transmitting, to the memory subsystem, a read host performance boost (HPB) buffer command identifying the active sub-region.
15. The non-transitory computer-readable storage medium of claim 13 , wherein the operations further comprise:
responsive to receiving, from the memory subsystem, a response comprising a Universal Flash Storage (UFS) Protocol Information Unit (UPIU) specifying an identifier of an inactive sub-region, discarding a plurality of L2P records associated with the inactive sub-region.
16. The non-transitory computer-readable storage medium of claim 13 , wherein the first sequential assist value is encoded by a security token associated with the first L2P record.
17. The non-transitory computer-readable storage medium of claim 16 , wherein the security token further comprises at least one of:
an encoding of a power-on reset count or an encoding of a sub-region update count.
18. The non-transitory computer-readable storage medium of claim 13 , wherein the memory component is a NAND type flash memory.