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gc: Tweaked lfs3_fs_gc_ to rely on lfs3_mtree_gc for fixgrms

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This does two things:

- Deduplicates another fixgrm call, now all fixgrm cleanup (outside of
  mkdir/remove) goes through lfs3_mtree_gc.

- Predicates fixgrm on if lookahead work is complete.

Code changes:

                 code          stack          ctx
  before:       35128           2136          660
  after:        35116 (-0.0%)   2136 (+0.0%)  660 (+0.0%)

                 code          stack          ctx
  gbmap before: 38052           2136          776
  gbmap after:  38040 (-0.0%)   2136 (+0.0%)  776 (+0.0%)
This commit is contained in:
Christopher Haster
2025-12-06 16:01:04 -06:00
parent 07ba12fb20
commit f05be19d0e
1 changed files with 40 additions and 52 deletions
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lfs3.c
+20 -32
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@@ -16128,7 +16128,7 @@ failed:;
// note lfs3_fs_stat should never go to disk
int lfs3_fs_stat(lfs3_t *lfs3, struct lfs3_fsinfo *fsinfo) {
// return various filesystem flags
uint32_t flags = lfs3->flags & (
fsinfo->flags = (lfs3->flags & (
LFS3_I_RDONLY
| LFS3_I_FLUSH
| LFS3_I_SYNC
@@ -16143,19 +16143,14 @@ int lfs3_fs_stat(lfs3_t *lfs3, struct lfs3_fsinfo *fsinfo) {
| LFS3_IFDEF_RDONLY(0, LFS3_I_COMPACT)
| LFS3_I_CKMETA
| LFS3_I_CKDATA
| LFS3_IFDEF_GBMAP(LFS3_I_GBMAP, 0));
// some flags we calculate on demand
// internally, LFS3_I_MKCONSISTENT just means we may have orphaned
// stickynotes, need to also include any grms
#ifndef LFS3_RDONLY
if (lfs3_t_ismkconsistent(lfs3->flags) || lfs3_grm_count(lfs3) > 0) {
flags |= LFS3_I_MKCONSISTENT;
}
#endif
fsinfo->flags = flags;
| LFS3_IFDEF_GBMAP(LFS3_I_GBMAP, 0)))
// LFS3_I_MKCONSISTENT is a bit of a special case,
// internally it strictly indicates untracked orphans, but
// externally it also includes any pending grms
| LFS3_IFDEF_RDONLY(0,
(lfs3_grm_count(lfs3) > 0)
? LFS3_I_MKCONSISTENT
: 0);
// return filesystem config, this may come from disk
fsinfo->block_size = lfs3->cfg->block_size;
@@ -16358,26 +16353,20 @@ int lfs3_fs_mkconsistent(lfs3_t *lfs3) {
// multiple passes
static int lfs3_fs_gc_(lfs3_t *lfs3, lfs3_mgc_t *mgc,
uint32_t flags, lfs3_soff_t steps) {
// fix pending grms if requested
#ifndef LFS3_RDONLY
if (lfs3_t_ismkconsistent(flags)
&& lfs3_grm_count(lfs3) > 0) {
int err = lfs3_fs_fixgrm(lfs3);
if (err) {
return err;
}
}
#endif
while ((lfs3_off_t)steps > 0) {
// do we have any pending work?
uint32_t pending = flags & (
(LFS3_IFDEF_RDONLY(0, LFS3_GC_MKCONSISTENT)
(lfs3->flags & (
LFS3_IFDEF_RDONLY(0, LFS3_GC_MKCONSISTENT)
| LFS3_IFDEF_RDONLY(0, LFS3_GC_LOOKAHEAD)
| LFS3_IFDEF_RDONLY(0, LFS3_GC_COMPACT)
| LFS3_GC_CKMETA
| LFS3_GC_CKDATA)
& lfs3->flags);
| LFS3_GC_CKDATA))
// including any pending grms
| LFS3_IFDEF_RDONLY(0,
(lfs3_grm_count(lfs3) > 0)
? LFS3_GC_MKCONSISTENT
: 0));
if (!pending) {
break;
}
@@ -16401,13 +16390,12 @@ static int lfs3_fs_gc_(lfs3_t *lfs3, lfs3_mgc_t *mgc,
// note that even though our current API prevents flags from
// changing mid-traversal, lfs3->flags can be updated by other
// operations
mgc->t.h.flags &= ~(
(LFS3_IFDEF_RDONLY(0, LFS3_GC_MKCONSISTENT)
mgc->t.h.flags &= ~(pending ^ (
LFS3_IFDEF_RDONLY(0, LFS3_GC_MKCONSISTENT)
| LFS3_IFDEF_RDONLY(0, LFS3_GC_LOOKAHEAD)
| LFS3_IFDEF_RDONLY(0, LFS3_GC_COMPACT)
| LFS3_GC_CKMETA
| LFS3_GC_CKDATA)
^ pending);
| LFS3_GC_CKDATA));
// will this traversal still make progress? no? start over
if (!(mgc->t.h.flags