Thread: pgsql: Fix bug in the new wait-until-lwlock-is-free mechanism.

Fix bug in the new wait-until-lwlock-is-free mechanism.

If there was a wait-until-free process in the head of the wait queue,
followed by an exclusive locker, the exclusive locker was not be woken up
as it should.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/82d4b262d9614958da38003cdc9d56915d9bcda0

Modified Files
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src/backend/storage/lmgr/lwlock.c |   25 ++++++++++++++++---------
1 files changed, 16 insertions(+), 9 deletions(-)