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mdbx: fix wrong freeDB search.

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Avoid search freeDB while tree is updating.
Bug was inherited from LMDB.
https://github.com/leo-yuriev/libmdbx/issues/31
This commit is contained in:
Leo Yuriev 2018-05-04 17:22:59 +03:00
parent 2bccc85ff8
commit 0c4b39bd11
1 changed files with 4 additions and 0 deletions
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4
mdb.c
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@ -2140,6 +2140,10 @@ mdb_page_alloc(MDB_cursor *mc, int num, MDB_page **mp, int flags)
/* If mc is updating the freeDB, then the freelist cannot play
* catch-up with itself by growing while trying to save it. */
flags &= ~(MDBX_ALLOC_GC | MDBX_ALLOC_KICK | MDBX_COALESCE | MDBX_LIFORECLAIM);
} else if (unlikely(txn->mt_dbs[FREE_DBI].md_entries == 0)) {
/* avoid (recursive) search inside empty tree and while tree is updating,
* https://github.com/leo-yuriev/libmdbx/issues/31 */
flags &= ~MDBX_ALLOC_GC;
}
}