Memory sub-system managing remapping for misaligned memory components

Patent metadata

Field	Value
Publication number	US-11727969-B2
Application number	US-202117532364-A
Country	US
Kind code	B2
Filing date	Nov 22, 2021
Priority date	Aug 28, 2019
Publication date	Aug 15, 2023
Grant date	Aug 15, 2023

Abstract

A processing device of a system receives a request to access a selected sector in a memory component. The selected sector is associated with a sector number. The processing device determines a virtual block corresponding to the selected sector. The virtual block is associated with a misalignment factor and a misalignment counter. The processing device determines if the misalignment counter satisfies a threshold criterion. In response to the misalignment counter satisfying the threshold criterion, the processing device generates an updated sector number by shifting the sector number by the misalignment factor and performs the access to the selected sector using the updated sector number. In response to the misalignment counter not satisfying the threshold criterion, the processing device updates the misalignment counter and performs the access to the selected sector using the sector number.

First claim

The invention claimed is:

1. A system comprising:
a memory component comprising a plurality of sectors; and
a processing device, operatively coupled with the memory component, to perform operations comprising:
receiving a request to access a selected sector in the plurality of sectors, the selected sector being associated with a sector number;
determining a virtual block corresponding to the selected sector, the virtual block being associated with a misalignment factor and a misalignment counter;
determining if the misalignment counter satisfies a threshold criterion; and
in response to the misalignment counter not satisfying the threshold criterion,
performing the access to the selected sector using the sector number.

2. The system of claim 1 , wherein the processing device is further configured to perform operations further comprising:
in response to the misalignment counter not satisfying the threshold criterion,
updating the misalignment counter,
wherein updating the misalignment counter further comprises:
determining if a misalignment of the selected sector is equal to the misalignment factor,
in response to the misalignment of the selected sector being equal to the misalignment factor,
incrementing the misalignment counter, and
in response to the misalignment of the selected sector not being equal to the misalignment factor, resetting the misalignment counter.

3. The system of claim 2 , wherein, in response to the misalignment of the selected sector not being equal to the misalignment factor, the processing device to perform operations further comprising:
setting the misalignment factor to the misalignment of the selected sector.

4. The system of claim 2 , wherein the misalignment of the selected sector is based on an address misalignment between a host starting address and a logical starting address internally set by the processing device.

5. The system of claim 2 , wherein the processing device is further configured to perform operations further comprising:
determining if the selected sector is aligned with a virtual page size in the virtual block; and
in response to the selected sector being aligned with the virtual page size, maintaining the misalignment counter at a current count and performing the access to the selected sector using the sector number.

6. The system of claim 1 , wherein the processing device is further configured to perform operations further comprising:
in response to the misalignment counter satisfying the threshold criterion,
generating an updated sector number based on the sector number and the misalignment factor; and
performing the access to the selected sector using the updated sector number.

7. The system of claim 1 , wherein the request to access is a read access or a write access.

8. The system of claim 1 , wherein the processing device is further configured to perform operations further comprising:
storing, in a misalignment table, a plurality of misalignment factors and a plurality of misalignment counters associated with a plurality of virtual blocks, respectively.

9. A method comprising:
receiving a request to access a selected sector in a plurality of sectors, the selected sector being associated with a sector number;
determining a virtual block corresponding to the selected sector, the virtual block being associated with a misalignment factor and a misalignment counter;
determining if the misalignment counter satisfies a threshold criterion; and
in response to the misalignment counter not satisfying the threshold criterion,
performing the access to the selected sector using the sector number.

10. The method of claim 9 , further comprising:
updating the misalignment counter in response to the misalignment counter not satisfying the threshold criterion, wherein updating the misalignment counter further comprises:
determining if a misalignment of the selected sector is equal to the misalignment factor,
in response to the misalignment of the selected sector being equal to the misalignment factor, incrementing the misalignment counter, and
in response to the misalignment of the selected sector not being equal to the misalignment factor, resetting the misalignment counter.

11. The method of claim 10 , further comprising:
in response to the misalignment of the selected sector not being equal to the misalignment factor,
setting the misalignment factor to the misalignment of the selected sector.

12. The method of claim 10 , wherein the misalignment of the selected sector is based on an address misalignment between a host starting address and a logical starting address internally set by a processing device.

13. The method of claim 10 , further comprising:
determining if the selected sector is aligned with a virtual page size in the virtual block; and
in response to the selected sector being aligned with the virtual page size, maintaining the misalignment counter at a current count and performing the access to the selected sector using the sector number.

14. The method of claim 9 , further comprising:
in response to the misalignment counter satisfying the threshold criterion,
generating an updated sector number based on the sector number and the misalignment factor, and performing the access to the selected sector using the updated sector number.

15. The method of claim 9 , wherein the request to access is a read access or a write access.

16. The method of claim 9 , further comprising:
storing, in a misalignment table, a plurality of misalignment factors and a plurality of misalignment counters associated with a plurality of virtual blocks, respectively.

17. At least one non-transitory machine-readable storage medium comprising instructions that, when executed by a processing device, cause the processing device to perform operations comprising:
receiving a request to access a selected sector in a plurality of sectors, the selected sector being associated with a sector number;
determining a virtual block corresponding to the selected sector, the virtual block being associated with a misalignment factor and a misalignment counter;
determining if the misalignment counter satisfies a threshold criterion; and
in response to the misalignment counter not satisfying the threshold criterion,
performing the access to the selected sector using the sector number.

18. The at least one non-transitory machine-readable storage medium of claim 17 , wherein the processing device performs operations further comprising:
in response to the misalignment counter not satisfying the threshold criterion, updating the misalignment counter, wherein updating the misalignment counter further comprises:
determining if a misalignment of the selected sector is equal to the misalignment factor,
in response to the misalignment of the selected sector being equal to the misalignment factor, incrementing the misalignment counter, and
in response to the misalignment of the selected sector not being equal to the misalignment factor, resetting the misalignment counter.

19. The at least one non-transitory machine-readable storage medium of claim 18 , wherein, in response to the misalignment of the selected sector not being equal to the misalignment factor, the processing device performs operations further comprising:
setting the misalignment factor to the misalignment of the selected sector.

20. The at least one non-transitory machine-readable storage medium of claim 18 , wherein the processing device performs operations further comprising:
deter

Assignees

• Micron Technology Inc

Inventors

• Porzio Luca
• Di Pasqua Marco
• Papa Paolo

Classifications

• G11C8/00 Primary

  Arrangements for selecting an address in a digital store (for stores using transistors G11C11/407, G11C11/413) · CPC title

• G06F11/073

  in a memory management context, e.g. virtual memory or cache management (memory management G06F12/00; testing of static memory units G11C29/00) · CPC title

• G06F12/0238

  Memory management in non-volatile memory, e.g. resistive RAM or ferroelectric memory · CPC title

• G06F12/0292

  using tables or multilevel address translation means (G06F12/023 takes precedence; address translation in virtual memory systems G06F12/10) · CPC title

• G11C29/76 Primary

  using address translation or modifications · CPC title