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Merge remote-tracking branch 'origin/mdb.RE/0.9'

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This commit is contained in:
Quanah Gibson-Mount 2015-01-19 13:31:51 -06:00
commit c2cb945c30
2 changed files with 11 additions and 8 deletions
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17
libraries/liblmdb/mdb.c
View file

@ -588,11 +588,11 @@ typedef struct MDB_rxbody {
* started from so we can avoid overwriting any data used in that
* particular version.
*/
txnid_t mrb_txnid;
volatile txnid_t mrb_txnid;
/** The process ID of the process owning this reader txn. */
MDB_PID_T mrb_pid;
volatile MDB_PID_T mrb_pid;
/** The thread ID of the thread owning this txn. */
MDB_THR_T mrb_tid;
volatile MDB_THR_T mrb_tid;
} MDB_rxbody;
/** The actual reader record, with cacheline padding. */
@ -640,12 +640,12 @@ typedef struct MDB_txbody {
* This is recorded here only for convenience; the value can always
* be determined by reading the main database meta pages.
*/
txnid_t mtb_txnid;
volatile txnid_t mtb_txnid;
/** The number of slots that have been used in the reader table.
* This always records the maximum count, it is not decremented
* when readers release their slots.
*/
unsigned mtb_numreaders;
volatile unsigned mtb_numreaders;
} MDB_txbody;
/** The actual reader table definition. */
@ -916,7 +916,7 @@ typedef struct MDB_meta {
/** Any persistent environment flags. @ref mdb_env */
#define mm_flags mm_dbs[0].md_flags
pgno_t mm_last_pg; /**< last used page in file */
txnid_t mm_txnid; /**< txnid that committed this page */
volatile txnid_t mm_txnid; /**< txnid that committed this page */
} MDB_meta;
/** Buffer for a stack-allocated meta page.
@ -2539,7 +2539,10 @@ mdb_txn_renew0(MDB_txn *txn)
return rc;
}
}
txn->mt_txnid = r->mr_txnid = ti->mti_txnid;
do /* LY: Retry on a race, ITS#7970. */
r->mr_txnid = ti->mti_txnid;
while(r->mr_txnid != ti->mti_txnid);
txn->mt_txnid = r->mr_txnid;
txn->mt_u.reader = r;
meta = env->me_metas[txn->mt_txnid & 1];
}

2
libraries/liblmdb/mdb_copy.c
View file

@ -64,7 +64,7 @@ int main(int argc,char * argv[])
act = "opening environment";
rc = mdb_env_create(&env);
if (rc == MDB_SUCCESS) {
rc = mdb_env_open(env, argv[1], flags, 0664);
rc = mdb_env_open(env, argv[1], flags, 0600);
}
if (rc == MDB_SUCCESS) {
act = "copying";