WARNING: This feature is brand new and has not been tested beyond the
existing regression suite. It should be thoroughly tested — including
stress, power-loss, and wear-levelling scenarios — before being used in
any production system.
When LX_NAND_FLASH_ENABLE_LAZY_SECTOR_RELEASE is defined and free blocks
exceed LX_NAND_FLASH_SECTOR_RELEASE_LAZY_THRESHOLD (default 10), releasing
a sector from a full block defers the copy+erase. A tombstone page is
written to a freshly-allocated block; the old full block is flagged
COMPACTION_PENDING in its block status and recorded in a new per-LG
compaction table. Compaction (merge + erase) is triggered lazily:
* sector_write: before writing to a full block with a pending source
* block_data_move: intercepts wear-levelling moves for pending LGs
* defragment: iterates all pending LGs (now actually implemented)
* block_allocate: emergency compaction when the free list is empty
Reads transparently fall back to the compaction-pending block when the
primary block does not contain the requested sector.
Crash recovery is handled in open_extended:
- Phase 1: detects COMPACTION_PENDING blocks and either clears the flag
(crash before mapping update — abort) or rebuilds compaction_table
(crash after mapping update — resume deferred compaction).
- Phase 2: erases orphaned ALLOCATED blocks not present in any mapping.
Without the flag, all paths remain unchanged and defragment returns
LX_NOT_SUPPORTED as before.
Fixes: https://github.com/eclipse-threadx/levelx/issues/70
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
New APIs
--------
- lx_nor_flash_format(): erases nor flash blocks and setup block metadata
- lx_nor_flash_open_extended(): same as lx_nor_flash_open() with
user data pointer a last argument.
- lx_nand_flash_open_extended(): same as lx_nand_flash_open() with
user data pointer a last argument.
Updates
-------
- lx_nor_flash_open(): calls lx_nor_flash_open_extended() with a NULL as
last argument
- lx_nand_flash_open(): calls lx_nand_flash_open_extended() with a NULL as
last argument
- regression tests: to call the lx_nor_flash_format()
Test results
-------------
100% tests passed, 0 tests failed out of 3
Total Test time (real) = 6.27 sec
3/3 Test #1: standalone_free_sector_verify_build::levelx_nand_flash_test ........ Passed 6.29 sec
100% tests passed, 0 tests failed out of 3
Total Test time (real) = 6.29 sec
3/3 Test #1: nor_obsolete_mapping_cache_build::levelx_nand_flash_test ........ Passed 6.58 sec
100% tests passed, 0 tests failed out of 3
Total Test time (real) = 6.58 sec
3/3 Test #1: nor_obsolete_cache_build::levelx_nand_flash_test ........ Passed 6.67 sec
100% tests passed, 0 tests failed out of 3
Total Test time (real) = 6.67 sec
3/3 Test #1: nor_mapping_cache_build::levelx_nand_flash_test ........ Passed 6.77 sec
100% tests passed, 0 tests failed out of 3
Total Test time (real) = 6.78 sec
3/3 Test #1: full_build::levelx_nand_flash_test ........ Passed 6.91 sec
100% tests passed, 0 tests failed out of 3
Total Test time (real) = 6.91 sec
3/3 Test #1: free_sector_verify_build::levelx_nand_flash_test ........ Passed 7.14 sec
100% tests passed, 0 tests failed out of 3
Total Test time (real) = 7.14 sec
3/3 Test #1: standalone_full_build::levelx_nand_flash_test ........ Passed 7.21 sec
100% tests passed, 0 tests failed out of 3
Total Test time (real) = 7.21 sec
3/3 Test #1: standalone_build::levelx_nand_flash_test ........ Passed 12.05 sec
100% tests passed, 0 tests failed out of 3
Total Test time (real) = 12.06 sec
3/3 Test #1: default_build_coverage::levelx_nand_flash_test ........ Passed 48.78 sec
100% tests passed, 0 tests failed out of 3
Total Test time (real) = 48.81 sec
Add new levelx APIs
New APIs
--------
- lx_nor_flash_format(): erases nor flash blocks and setup block metadata
- lx_nor_flash_open_extended(): same as lx_nor_flash_open() with
user data pointer a last argument.
- lx_nand_flash_open_extended(): same as lx_nand_flash_open() with
user data pointer a last argument.
Updates
-------
- lx_nor_flash_open(): calls lx_nor_flash_open_extended() with a NULL as
last argument
- lx_nand_flash_open(): calls lx_nand_flash_open_extended() with a NULL as
last argument
- regression tests: to call the lx_nor_flash_format()
Test results
-------------
100% tests passed, 0 tests failed out of 3
Total Test time (real) = 6.27 sec
3/3 Test #1: standalone_free_sector_verify_build::levelx_nand_flash_test ........ Passed 6.29 sec
100% tests passed, 0 tests failed out of 3
Total Test time (real) = 6.29 sec
3/3 Test #1: nor_obsolete_mapping_cache_build::levelx_nand_flash_test ........ Passed 6.58 sec
100% tests passed, 0 tests failed out of 3
Total Test time (real) = 6.58 sec
3/3 Test #1: nor_obsolete_cache_build::levelx_nand_flash_test ........ Passed 6.67 sec
100% tests passed, 0 tests failed out of 3
Total Test time (real) = 6.67 sec
3/3 Test #1: nor_mapping_cache_build::levelx_nand_flash_test ........ Passed 6.77 sec
100% tests passed, 0 tests failed out of 3
Total Test time (real) = 6.78 sec
3/3 Test #1: full_build::levelx_nand_flash_test ........ Passed 6.91 sec
100% tests passed, 0 tests failed out of 3
Total Test time (real) = 6.91 sec
3/3 Test #1: free_sector_verify_build::levelx_nand_flash_test ........ Passed 7.14 sec
100% tests passed, 0 tests failed out of 3
Total Test time (real) = 7.14 sec
3/3 Test #1: standalone_full_build::levelx_nand_flash_test ........ Passed 7.21 sec
100% tests passed, 0 tests failed out of 3
Total Test time (real) = 7.21 sec
3/3 Test #1: standalone_build::levelx_nand_flash_test ........ Passed 12.05 sec
100% tests passed, 0 tests failed out of 3
Total Test time (real) = 12.06 sec
3/3 Test #1: default_build_coverage::levelx_nand_flash_test ........ Passed 48.78 sec
100% tests passed, 0 tests failed out of 3
Total Test time (real) = 48.81 sec
fix: Write the correct meta data on the block after erase
add missing nand_flash_format_extended API
22299de Remove internal deprecated files.
2b9332f Fix ECC issues by new NAND logic
6a5eda1 Add a notice for not released file.
b756fb0 Upgrade to the latest Container Images.
