Hello,
This fix
allows to protect several backends with a global lock during
update operations.
It is configurable and by default the global lock is not enabled.
Under rare condition some plugin may lead to deadlocks. Global
lock would be enabled to prevent those deadlocks
during critical phases or to limit production impact during
investigations.
I will do some performance measurement with this fix.
https://fedorahosted.org/389/ticket/47936
https://fedorahosted.org/389/attachment/ticket/47936/0001-Ticket-47936-Create-a-global-lock-to-serialize-write.patch
thanks
thierry