This drops LFS3_t_MUTATED in favor of just using LFS3_t_CKPOINTED
everywhere:
1. These meant roughly the same thing, with LFS3_t_MUTATED being a bit
tighter at the cost of needing to be explicitly set.
2. The implicit setting of LFS3_t_CKPOINTED by lfs3_alloc_ckpoint -- a
function that already needs to be called before mutation -- means we
have one less thing to worry about.
Implicit properties like LFS3_t_CKPOINTED are great for building a
reliable system. Manual flags like LFS3_t_MUTATED, not so much.
3. Why use two flags when we can get away with one?
The only downside is we may unnecessarily clobber gc/traversal work when
we don't actually mutate the filesystem. Failed file open calls are a
good example.
However this tradeoff seems well worth it for an overall simpler +
more reliable system.
---
Saves a bit of code:
code stack ctx
before: 37220 2352 688
after: 37160 (-0.2%) 2352 (+0.0%) 688 (+0.0%)
code stack ctx
gbmap before: 40184 2368 856
gbmap after: 40132 (-0.1%) 2368 (+0.0%) 856 (+0.0%)
Christopher Haster
8a58954828