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0f33605866
Add a dlist to track all active lockwait child processes. Everytime creating a new lockwait handle, check if there is already an active lockwait process for this database/key and if so, send the new request straight to the overflow queue. This means we will only have one active lockwaic child process for a certain key, even if there were thousands of fetch-lock requests for this key. When the lockwait processing finishes for the original request, the processing in d_overflow() will automagically process all remaining keys as well. Add back a --nosetsched argument to make it easier to run under gdb (This used to be ctdb commit 3e9317a2e1f687b04bf51575d47fcd4faa6e6515)