Verification of modified dirty page bitmap

1 . A method comprising:

receiving, by a processing device, during migration of a namespace of a memory device, a write request with respect to a target page associated with the namespace;

identifying a first bitmap of a set of bitmaps, wherein the first bitmap is referenced by a current active bitmap pointer;

reading a first portion of the first bitmap, wherein the first portion contains a first bit that tracks a status of the target page;

modifying the first bit of the first portion of a bitmap;

storing the modified first portion;

identifying a second bitmap of the set of bitmaps, wherein the second bitmap is referenced by the current active bitmap pointer;

reading a second portion of the second bitmap, wherein the second portion contains a second bit that tracks a status of the target page;

determining whether the second portion matches the modified first portion;

responsive to determining that the second portion does not match the modified first portion,

identifying a third bitmap of the set of bitmaps, wherein the third bitmap is referenced by the current active bitmap pointer;

reading a third portion of the third bitmap, wherein the third portion contains a third bit that tracks a status of the target page;

modifying the third bit of the third portion; and

storing the modified third portion.

2 . The method of claim 1 , further comprising:

responsive to determining that the second portion matches the modified first portion, determining that the first bitmap is the second bitmap.

3 . The method of claim 1 , wherein each portion of each bitmap of the set of bitmaps includes a predetermined number of bits, each bit corresponding to a page of the namespace.

4 . The method of claim 1 , wherein reading a first portion of the first bitmap comprises:

determining a first memory address storing the first portion, wherein the first memory address is based on a base memory address of the current active bitmap pointer.

5 . The method of claim 1 , wherein determining whether the second portion matches the modified first portion comprises:

comparing the modified first portion with the second portion.

6 . The method of claim 1 , wherein determining that the second portion matches the modified first portion comprises:

determining that each bit of the second portion matches each bit of the modified first portion.

7 . The method of claim 1 , wherein determining that the second portion does not match the modified first portion comprises:

determining that at least one bit of the second portion does not match a corresponding bit of the modified first portion.

8 . A system comprising:

a plurality of memory devices; and

a processing device, operatively coupled with the plurality of memory devices, to perform operations comprising:

receiving, by a processing device, during migration of a namespace of a memory device, a write request with respect to a target page associated with the namespace;

identifying a first bitmap of a set of bitmaps, wherein the first bitmap is referenced by a current active bitmap pointer;

reading a first portion of the first bitmap, wherein the first portion contains a first bit that tracks a status of the target page;

modifying the first bit of the first portion of a bitmap;

storing the modified first portion;

identifying a second bitmap of the set of bitmaps, wherein the second bitmap is referenced by the current active bitmap pointer;

reading a second portion of the second bitmap, wherein the second portion contains a second bit that tracks a status of the target page;

determining whether the second portion matches the modified first portion;

responsive to determining that the second portion does not match the modified first portion,

identifying a third bitmap of the set of bitmaps, wherein the third bitmap is referenced by the current active bitmap pointer;

reading a third portion of the third bitmap, wherein the third portion contains a third bit that tracks a status of the target page;

modifying the third bit of the third portion; and

storing the modified third portion.

9 . The system of claim 8 , wherein the processing device is to perform operations further comprising:

responsive to determining that the second portion matches the modified first portion, determining that the first bitmap is the second bitmap.

10 . The system of claim 8 , wherein each portion of each bitmap of the set of bitmaps includes a predetermined number of bits, each bit corresponding to a page of the namespace.

11 . The system of claim 8 , wherein reading a first portion of the first bitmap comprises:

determining a first memory address storing the first portion, wherein the first memory address is based on a base memory address of the current active bitmap pointer.

12 . The system of claim 8 , wherein determining whether the second portion matches the modified first portion comprises:

comparing the modified first portion with the second portion.

13 . The system of claim 8 , wherein determining that the second portion matches the modified first portion comprises:

determining that each bit of the second portion matches each bit of the modified first portion.

14 . The system of claim 8 , wherein determining that the second portion does not match the modified first portion comprises:

determining that at least one bit of the second portion does not match a corresponding bit of the modified first portion.

15 . A non-transitory computer-readable storage medium comprising instructions that, when executed by a processing device, cause the processing device to perform operations comprising:

receiving, by a processing device, during migration of a namespace of a memory device, a write request with respect to a target page associated with the namespace;

identifying a first bitmap of a set of bitmaps, wherein the first bitmap is referenced by a current active bitmap pointer;

reading a first portion of the first bitmap, wherein the first portion contains a first bit that tracks a status of the target page;

modifying the first bit of the first portion of a bitmap;

storing the modified first portion;

identifying a second bitmap of the set of bitmaps, wherein the second bitmap is referenced by the current active bitmap pointer;

reading a second portion of the second bitmap, wherein the second portion contains a second bit that tracks a status of the target page;

determining whether the second portion matches the modified first portion;

responsive to determining that the second portion does not match the modified first portion,

identifying a third bitmap of the set of bitmaps, wherein the third bitmap is referenced by the current active bitmap pointer;

reading a third portion of the third bitmap, wherein the third portion contains a third bit that tracks a status of the target page;

modifying the third bit of the third portion; and

storing the modified third portion.

16 . The non-transitory computer-readable storage medium of claim 15 , wherein the processing device is to perform operations further comprising:

responsive to determining that the second portion matches the modified first portion, determining that the first bitmap is the second bitmap.

17 . The non-transitory computer-readable storage medium of claim 15 ,

wherein each portion of each bitmap of the set of bitmaps includes a predetermined number of bits, each bit corresponding to a page of the namespace.

18 . The non-transitory computer-readable storage medium of claim 15 , wherein reading a first portion of the first bitmap comprises:

determining a first memory address storing the first portion, wherein the first memory address is based on a base memory address of the current active bitmap pointer.

19 . The non-transitory computer-readable storage medium of claim 15 , wherein determining that the second portion matches the modified first portion comprises:

determining that each bit of the second portion matches each bit of the modified first portion.

20 . The non-transitory computer-readable storage medium of claim 15 , wherein determining that the second portion does not match the modified first portion comprises:

determining that at least one bit of the second portion does not match a corresponding bit of the modified first portion.