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H A Dcommit.cdiff a931da6ac9331a6c80dd91c199105806f2336188 Wed Aug 04 03:35:12 CEST 2010 Theodore Ts'o <tytso@mit.edu> 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>
H A Dtransaction.cdiff a931da6ac9331a6c80dd91c199105806f2336188 Wed Aug 04 03:35:12 CEST 2010 Theodore Ts'o <tytso@mit.edu> 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>