Theodore Ts'o a931da6ac9 jbd2: Change j_state_lock to be a rwlock_t ...

Lockstat reports have shown that j_state_lock is a major source of
lock contention, especially on systems with more than 4 CPU cores.  So
change it to be a read/write spinlock.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

2010-08-03 21:35:12 -04:00

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