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| author | Howard Chu <hyc@symas.com> | 2021-09-19 21:12:27 +0100 |
|---|---|---|
| committer | Howard Chu <hyc@symas.com> | 2021-09-22 15:47:04 +0100 |
| commit | 5f54dea4ec36bd2f7c2fab1ded7d20c7a07ff8f9 (patch) | |
| tree | dd9273790c5253d37dfb26a4a2c54eec9d0cf1bb | |
| parent | Merge pull request #7899 (diff) | |
| download | monero-5f54dea4ec36bd2f7c2fab1ded7d20c7a07ff8f9.tar.xz | |
LMDB: fix deadlock in resized detection
| -rw-r--r-- | src/blockchain_db/lmdb/db_lmdb.cpp | 15 | ||||
| -rw-r--r-- | src/blockchain_db/lmdb/db_lmdb.h | 1 |
2 files changed, 13 insertions, 3 deletions
diff --git a/src/blockchain_db/lmdb/db_lmdb.cpp b/src/blockchain_db/lmdb/db_lmdb.cpp index 1d7b10648..c059a3e29 100644 --- a/src/blockchain_db/lmdb/db_lmdb.cpp +++ b/src/blockchain_db/lmdb/db_lmdb.cpp @@ -467,7 +467,12 @@ void mdb_txn_safe::allow_new_txns() creation_gate.clear(); } -void lmdb_resized(MDB_env *env) +void mdb_txn_safe::increment_txns(int i) +{ + num_active_txns += i; +} + +void lmdb_resized(MDB_env *env, int isactive) { mdb_txn_safe::prevent_new_txns(); @@ -478,7 +483,11 @@ void lmdb_resized(MDB_env *env) mdb_env_info(env, &mei); uint64_t old = mei.me_mapsize; + if (isactive) + mdb_txn_safe::increment_txns(-1); mdb_txn_safe::wait_no_active_txns(); + if (isactive) + mdb_txn_safe::increment_txns(1); int result = mdb_env_set_mapsize(env, 0); if (result) @@ -496,7 +505,7 @@ inline int lmdb_txn_begin(MDB_env *env, MDB_txn *parent, unsigned int flags, MDB { int res = mdb_txn_begin(env, parent, flags, txn); if (res == MDB_MAP_RESIZED) { - lmdb_resized(env); + lmdb_resized(env, 1); res = mdb_txn_begin(env, parent, flags, txn); } return res; @@ -506,7 +515,7 @@ inline int lmdb_txn_renew(MDB_txn *txn) { int res = mdb_txn_renew(txn); if (res == MDB_MAP_RESIZED) { - lmdb_resized(mdb_txn_env(txn)); + lmdb_resized(mdb_txn_env(txn), 0); res = mdb_txn_renew(txn); } return res; diff --git a/src/blockchain_db/lmdb/db_lmdb.h b/src/blockchain_db/lmdb/db_lmdb.h index 0e6d70039..d87bc6e49 100644 --- a/src/blockchain_db/lmdb/db_lmdb.h +++ b/src/blockchain_db/lmdb/db_lmdb.h @@ -154,6 +154,7 @@ struct mdb_txn_safe static void prevent_new_txns(); static void wait_no_active_txns(); static void allow_new_txns(); + static void increment_txns(int); mdb_threadinfo* m_tinfo; MDB_txn* m_txn; |