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mdbx: refine mdbx_update_gc(), add extra audit.

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Change-Id: I70b5bba977ab6fadfdffed722226ebe02abe252c
This commit is contained in:
Leonid Yuriev 2018-09-15 15:19:16 +03:00
parent c945359858
commit 40edf7e323
1 changed files with 33 additions and 8 deletions
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41
src/mdbx.c
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@ -3576,7 +3576,7 @@ static int mdbx_prep_backlog(MDBX_txn *txn, MDBX_cursor *mc) {
/* Count all the pages in each DB and in the freelist and make sure
* it matches the actual number of pages being used.
* All named DBs must be open for a correct count. */
static int mdbx_audit(MDBX_txn *txn, unsigned befree_stored) {
static __cold int mdbx_audit(MDBX_txn *txn, unsigned befree_stored) {
MDBX_val key, data;
const pgno_t pending =
@ -3674,12 +3674,11 @@ static int mdbx_update_gc(MDBX_txn *txn) {
(void)dbg_prefix_mode;
mdbx_trace("\n>>> @%" PRIaTXN, txn->mt_txnid);
unsigned befree_stored = 0, loop = 0;
MDBX_cursor mc;
int rc = mdbx_cursor_init(&mc, txn, FREE_DBI);
if (unlikely(rc != MDBX_SUCCESS))
return rc;
unsigned befree_stored = 0, loop = 0;
goto bailout;
retry:
mdbx_trace(" >> restart");
@ -3762,6 +3761,11 @@ retry:
// handle loose pages - put ones into the reclaimed- or befree-list
mdbx_tassert(txn, mdbx_pnl_check(env->me_reclaimed_pglist, true));
if (mdbx_audit_enabled()) {
rc = mdbx_audit(txn, befree_stored);
if (unlikely(rc != MDBX_SUCCESS))
goto bailout;
}
if (txn->mt_loose_pages) {
/* Return loose page numbers to me_reclaimed_pglist,
* though usually none are left at this point.
@ -3772,7 +3776,7 @@ retry:
* since unable to return them to me_reclaimed_pglist. */
if (unlikely((rc = mdbx_pnl_need(&txn->mt_befree_pages,
txn->mt_loose_count)) != 0))
return rc;
goto bailout;
for (MDBX_page *mp = txn->mt_loose_pages; mp; mp = NEXT_LOOSE_PAGE(mp))
mdbx_pnl_xappend(txn->mt_befree_pages, mp->mp_pgno);
mdbx_trace("%s: append %u loose-pages to befree-pages", dbg_prefix_mode,
@ -3851,6 +3855,11 @@ retry:
txn->mt_loose_pages = NULL;
txn->mt_loose_count = 0;
if (mdbx_audit_enabled()) {
rc = mdbx_audit(txn, befree_stored);
if (unlikely(rc != MDBX_SUCCESS))
goto bailout;
}
}
// handle reclaimed pages - return suitable into unallocated space
@ -3884,6 +3893,11 @@ retry:
dbg_prefix_mode, txn->mt_next_pgno - tail, tail, txn->mt_next_pgno);
txn->mt_next_pgno = tail;
mdbx_tassert(txn, mdbx_pnl_check(env->me_reclaimed_pglist, true));
if (mdbx_audit_enabled()) {
rc = mdbx_audit(txn, befree_stored);
if (unlikely(rc != MDBX_SUCCESS))
goto bailout;
}
}
}
@ -3931,6 +3945,11 @@ retry:
mdbx_tassert(txn, txn->mt_loose_count == 0);
mdbx_trace(" >> reserving");
if (mdbx_audit_enabled()) {
rc = mdbx_audit(txn, befree_stored);
if (unlikely(rc != MDBX_SUCCESS))
goto bailout;
}
const unsigned amount =
env->me_reclaimed_pglist ? MDBX_PNL_SIZE(env->me_reclaimed_pglist) : 0;
const unsigned left = amount - settled;
@ -4213,6 +4232,11 @@ retry:
(unsigned)(to - env->me_reclaimed_pglist), to[-1], fill_gc_id);
left -= chunk;
if (mdbx_audit_enabled()) {
rc = mdbx_audit(txn, befree_stored + amount - left);
if (unlikely(rc != MDBX_SUCCESS))
goto bailout;
}
if (left == 0) {
rc = MDBX_SUCCESS;
break;
@ -4240,11 +4264,12 @@ retry:
goto retry;
}
mdbx_tassert(txn,
txn->mt_lifo_reclaimed == NULL ||
cleaned_gc_slot == MDBX_PNL_SIZE(txn->mt_lifo_reclaimed));
bailout:
if (txn->mt_lifo_reclaimed) {
mdbx_tassert(txn,
rc != MDBX_SUCCESS ||
cleaned_gc_slot == MDBX_PNL_SIZE(txn->mt_lifo_reclaimed));
MDBX_PNL_SIZE(txn->mt_lifo_reclaimed) = 0;
if (txn != env->me_txn0) {
mdbx_txl_free(txn->mt_lifo_reclaimed);