tree 2d4ea766def9a98d21c2379f41e796b0e57ccd6b
parent a51dca9cd3bb4ec5a05bfb6feabf024a5c808a37
author Theodore Ts'o <tytso@mit.edu> 1280885712 -0400
committer Theodore Ts'o <tytso@mit.edu> 1280885712 -0400

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>