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From 1f33a6d9109792c0a2c88793092264080fe856b0 Mon Sep 17 00:00:00 2001
From: Howard Chu <hyc@openldap.org>
Date: Fri, 22 Jun 2018 16:30:13 +0100
Subject: [PATCH 038/109] ITS#8756 remove loose pg from dirty list in
freelist_save
---
libraries/liblmdb/mdb.c | 33 ++++++++++++++++++++++++++++++++-
1 file changed, 32 insertions(+), 1 deletion(-)
diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index 0662f2d8b..e12af4482 100644
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -3094,10 +3094,41 @@ mdb_freelist_save(MDB_txn *txn)
* we may be unable to return them to me_pghead.
*/
MDB_page *mp = txn->mt_loose_pgs;
+ MDB_ID2 *dl = txn->mt_u.dirty_list;
+ unsigned x;
if ((rc = mdb_midl_need(&txn->mt_free_pgs, txn->mt_loose_count)) != 0)
return rc;
- for (; mp; mp = NEXT_LOOSE_PAGE(mp))
+ for (; mp; mp = NEXT_LOOSE_PAGE(mp)) {
mdb_midl_xappend(txn->mt_free_pgs, mp->mp_pgno);
+ /* must also remove from dirty list */
+ if (txn->mt_flags & MDB_TXN_WRITEMAP) {
+ for (x=1; x<=dl[0].mid; x++)
+ if (dl[x].mid == mp->mp_pgno)
+ break;
+ mdb_tassert(txn, x <= dl[0].mid);
+ } else {
+ x = mdb_mid2l_search(dl, mp->mp_pgno);
+ mdb_tassert(txn, dl[x].mid == mp->mp_pgno);
+ }
+ dl[x].mptr = NULL;
+ mdb_dpage_free(env, mp);
+ }
+ {
+ /* squash freed slots out of the dirty list */
+ unsigned y;
+ for (y=1; dl[y].mptr && y <= dl[0].mid; y++);
+ if (y <= dl[0].mid) {
+ for(x=y, y++;;) {
+ while (!dl[y].mptr && y <= dl[0].mid) y++;
+ if (y > dl[0].mid) break;
+ dl[x++] = dl[y++];
+ }
+ dl[0].mid = x-1;
+ } else {
+ /* all slots freed */
+ dl[0].mid = 0;
+ }
+ }
txn->mt_loose_pgs = NULL;
txn->mt_loose_count = 0;
}
--
2.19.1
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