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mdbx: minor refine spilling.

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Change-Id: I243ebff592ac7ad544bbd382c93d2e5d4444b081
This commit is contained in:
Leonid Yuriev 2021-04-22 13:44:37 +03:00
parent aaf465b942
commit 0b9272209a
1 changed files with 7 additions and 11 deletions
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18
src/core.c
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@ -4164,6 +4164,7 @@ static __cold __maybe_unused bool mdbx_dirtylist_check(MDBX_txn *txn) {
return false;
mdbx_tassert(txn, dp->mp_flags == P_LOOSE || IS_MODIFIABLE(txn, dp));
mdbx_tassert(txn, (dp->mp_flags & P_KEEP) == 0);
if (dp->mp_flags == P_LOOSE) {
loose += 1;
} else if (unlikely(!IS_MODIFIABLE(txn, dp)))
@ -4800,11 +4801,8 @@ static void mdbx_cursor_xkeep(MDBX_cursor *mc, unsigned pflags) {
MDBX_page *mp = NULL;
for (unsigned j = 0; j < m3->mc_snum; j++) {
mp = m3->mc_pg[j];
if ((mp->mp_flags & mask) == pflags &&
(pflags || IS_MODIFIABLE(mc->mc_txn, mp))) {
mdbx_cassert(mc, IS_MODIFIABLE(mc->mc_txn, mp));
if (IS_MODIFIABLE(mc->mc_txn, mp) && (mp->mp_flags & mask) == pflags)
mp->mp_flags ^= P_KEEP;
}
}
if (!(mp && IS_LEAF(mp)))
break;
@ -4847,10 +4845,8 @@ static void mdbx_txn_xkeep(MDBX_txn *txn, MDBX_cursor *m0,
if (pgno == P_INVALID)
continue;
MDBX_page *dp = mdbx_dpl_find(txn->tw.dirtylist, pgno);
if (dp && (dp->mp_flags & mask) == pflags) {
mdbx_tassert(txn, IS_MODIFIABLE(txn, dp));
if (dp && (dp->mp_flags & mask) == pflags)
dp->mp_flags ^= P_KEEP;
}
}
}
}
@ -4984,6 +4980,9 @@ static int mdbx_txn_spill(MDBX_txn *txn, MDBX_cursor *m0, unsigned need) {
mdbx_txn_xkeep(txn, m0, P_KEEP, keep > 0);
mdbx_tassert(txn, mdbx_dirtylist_check(txn));
mdbx_notice("spilled %u dirty-entries, now have %u dirty-room", spilled,
txn->tw.dirtyroom);
bailout:
txn->mt_flags |= rc ? MDBX_TXN_ERROR : MDBX_TXN_SPILLS;
return rc;
@ -4991,8 +4990,6 @@ bailout:
static int mdbx_cursor_spill(MDBX_cursor *mc, const MDBX_val *key,
const MDBX_val *data) {
if (mc->mc_flags & C_SUB)
return MDBX_SUCCESS;
MDBX_txn *txn = mc->mc_txn;
if (txn->mt_flags & MDBX_WRITEMAP)
return MDBX_SUCCESS;
@ -6304,6 +6301,7 @@ __hot static void mdbx_page_copy(MDBX_page *dst, MDBX_page *src, size_t psize) {
* it back and make it dirty/writable again. */
static struct page_result __must_check_result
mdbx_page_unspill(MDBX_txn *const txn, MDBX_page *mp) {
mdbx_notice("unspill page %" PRIaPGNO, mp->mp_pgno);
mdbx_tassert(txn, (txn->mt_flags & MDBX_WRITEMAP) == 0);
mdbx_tassert(txn, IS_SPILLED(txn, mp));
const pgno_t spilled_pgno = mp->mp_pgno << 1;
@ -6323,7 +6321,6 @@ mdbx_page_unspill(MDBX_txn *const txn, MDBX_page *mp) {
return ret;
}
mdbx_page_copy(ret.page, mp, pgno2bytes(txn->mt_env, npages));
mdbx_debug("unspill page %" PRIaPGNO, mp->mp_pgno);
if (scan == txn) {
/* If in current txn, this page is no longer spilled.
* If it happens to be the last page, truncate the spill list.
@ -6436,7 +6433,6 @@ __hot static int mdbx_page_touch(MDBX_cursor *mc) {
mdbx_tassert(txn, np != nullptr);
goto done;
}
mdbx_tassert(txn, np == nullptr);
goto fail;
}