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Merge pull request #233 from ARMmbed/discourage-no-wear-leveling

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Change block_cycles disable from 0 to -1
This commit is contained in:
Christopher Haster
2019-07-28 21:35:48 -05:00
committed by GitHub
parent 582b596ed1 e8c023aab0
commit 74fe46de3d
3 changed files with 18 additions and 8 deletions
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12
lfs.c
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@@ -1468,7 +1468,7 @@ static int lfs_dir_compact(lfs_t *lfs,
// increment revision count
dir->rev += 1;
if (lfs->cfg->block_cycles &&
if (lfs->cfg->block_cycles > 0 &&
(dir->rev % (lfs->cfg->block_cycles+1) == 0)) {
if (lfs_pair_cmp(dir->pair, (const lfs_block_t[2]){0, 1}) == 0) {
// oh no! we're writing too much to the superblock,
@@ -3226,8 +3226,14 @@ static int lfs_init(lfs_t *lfs, const struct lfs_config *cfg) {
LFS_ASSERT(4*lfs_npw2(0xffffffff / (lfs->cfg->block_size-2*4))
<= lfs->cfg->block_size);
// we don't support some corner cases
LFS_ASSERT(lfs->cfg->block_cycles < 0xffffffff);
// block_cycles = 0 is no longer supported.
//
// block_cycles is the number of erase cycles before littlefs evicts
// metadata logs as a part of wear leveling. Suggested values are in the
// range of 100-1000, or set block_cycles to -1 to disable block-level
// wear-leveling.
LFS_ASSERT(lfs->cfg->block_cycles != 0);
// setup read cache
if (lfs->cfg->read_buffer) {