tree ec29f82e1d7bb1987dcadc00497daf69d6955483
parent c278bfecebfb1ed67c326ef472660878baa745cd
author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> 1201582706 -0500
committer Theodore Ts'o <tytso@mit.edu> 1201582706 -0500

ext4: Convert truncate_mutex to read write semaphore.

We are currently taking the truncate_mutex for every read. This would have
performance impact on large CPU configuration. Convert the lock to read write
semaphore and take read lock when we are trying to read the file.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>