Ticket 47936: Create a global lock to serialize write operations over several backends
Bug Description:
Some txn-post plugin may trigger operation on other backend.
This can easily conduct to deadlock, with locks (backend locks, plugin locks
or db page lock) taken in opposite order.
Fix Description:
Creating a global lock that will be acquired when updating any backend
(any ldbm database, cn=config, cn=schema).
It introduces a new config attribute:
dn: cn=config
nsslapd-global-backend-lock: <on|off(default)>
https://fedorahosted.org/389/ticket/47936
Reviewed by: Rich, Ludwig, Noriko (thanks to all of you !)
Platforms tested: F20/F21
Flag Day: no
Doc impact: no