Official usptream patch #2 Source: http://www.oracle.com/technology/products/berkeley-db/db/update/4.6.21/patch.4.6.21.html *** mp/mp_region.c 2007-05-18 03:18:01.000000000 +1000 --- mp/mp_region.c 2008-06-24 13:15:56.000000000 +1000 *************** *** 249,256 **** mtx_base = htab[0].mtx_hash; } if (mtx_base != MUTEX_INVALID) ! mtx_base += reginfo_off * htab_buckets; /* Allocate hash table space and initialize it. */ if ((ret = __env_alloc(infop, --- 249,262 ---- mtx_base = htab[0].mtx_hash; } + /* + * We preallocated all of the mutexes in a block, so for regions after + * the first, we skip mutexes in use in earlier regions. Each region + * has the same number of buckets and there are two mutexes per hash + * bucket (the bucket mutex and the I/O mutex). + */ if (mtx_base != MUTEX_INVALID) ! mtx_base += reginfo_off * htab_buckets * 2; /* Allocate hash table space and initialize it. */ if ((ret = __env_alloc(infop,