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mdbx: maintaining retired pages sequence.

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This commit is contained in:
Leo Yuriev 2019-09-20 21:26:21 +03:00 committed by Leonid Yuriev
parent c80a5cabd6
commit 44d94a76e5
1 changed files with 8 additions and 5 deletions
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13
src/elements/core.c
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@ -3506,6 +3506,7 @@ static int mdbx_txn_renew0(MDBX_txn *txn, unsigned flags) {
if (likely(r)) {
safe_txnid_reset(&r->mr_txnid);
r->mr_snapshot_pages_used = meta->mm_geo.next;
r->mr_snapshot_pages_retired = meta->mm_pages_retired;
safe_txnid_set(&r->mr_txnid, snap);
mdbx_jitter4testing(false);
mdbx_assert(env, r->mr_pid == mdbx_getpid());
@ -4197,7 +4198,7 @@ static __cold int mdbx_audit(MDBX_txn *txn, unsigned retired_stored) {
return MDBX_PROBLEM;
}
static __inline void clean_reserved_rc_pnl(MDBX_env *env, MDBX_val pnl) {
static __inline void clean_reserved_gc_pnl(MDBX_env *env, MDBX_val pnl) {
/* PNL is initially empty, zero out at least the length */
memset(pnl.iov_base, 0, sizeof(pgno_t));
if ((env->me_flags & (MDBX_WRITEMAP | MDBX_NOMEMINIT)) == 0)
@ -4443,7 +4444,7 @@ retry:
}
}
// handle retired-list - store ones into singe gc-record
// handle retired-list - store ones into single gc-record
if (retired_stored < MDBX_PNL_SIZE(txn->mt_retired_pages)) {
if (unlikely(!retired_stored)) {
/* Make sure last page of GC is touched and on retired-list */
@ -4675,7 +4676,7 @@ retry:
if (unlikely(rc != MDBX_SUCCESS))
goto bailout;
clean_reserved_rc_pnl(env, data);
clean_reserved_gc_pnl(env, data);
settled += chunk;
mdbx_trace("%s.settled %u (+%u), continue", dbg_prefix_mode, settled,
chunk);
@ -4778,7 +4779,7 @@ retry:
mc.mc_flags &= ~C_GCFREEZE;
if (unlikely(rc != MDBX_SUCCESS))
goto bailout;
clean_reserved_rc_pnl(env, data);
clean_reserved_gc_pnl(env, data);
if (unlikely(txn->mt_loose_count ||
amount != MDBX_PNL_SIZE(env->me_reclaimed_pglist))) {
@ -5237,7 +5238,6 @@ int mdbx_txn_commit(MDBX_txn *txn) {
mdbx_pnl_free(env->me_reclaimed_pglist);
env->me_reclaimed_pglist = NULL;
mdbx_pnl_shrink(&txn->mt_retired_pages);
if (mdbx_audit_enabled()) {
rc = mdbx_audit(txn, 0);
@ -5253,6 +5253,8 @@ int mdbx_txn_commit(MDBX_txn *txn) {
meta.mm_extra_flags = head->mm_extra_flags;
meta.mm_validator_id = head->mm_validator_id;
meta.mm_extra_pagehdr = head->mm_extra_pagehdr;
meta.mm_pages_retired =
head->mm_pages_retired + MDBX_PNL_SIZE(txn->mt_retired_pages);
meta.mm_geo = txn->mt_geo;
meta.mm_dbs[FREE_DBI] = txn->mt_dbs[FREE_DBI];
@ -5814,6 +5816,7 @@ static int mdbx_sync_locked(MDBX_env *env, unsigned flags,
target->mm_dbs[FREE_DBI] = pending->mm_dbs[FREE_DBI];
target->mm_dbs[MAIN_DBI] = pending->mm_dbs[MAIN_DBI];
target->mm_canary = pending->mm_canary;
target->mm_pages_retired = pending->mm_pages_retired;
mdbx_jitter4testing(true);
mdbx_flush_noncoherent_cpu_writeback();