NTFS: Improve scalability by changing the driver global spin lock in

      fs/ntfs/aops.c::ntfs_end_buffer_async_read() to a bit spin lock
      in the first buffer head of a page.

Signed-off-by: Anton Altaparmakov <aia21@cantab.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/fs/ntfs/ChangeLog b/fs/ntfs/ChangeLog
index 029f856c56c..32a4150ebcb 100644
--- a/fs/ntfs/ChangeLog
+++ b/fs/ntfs/ChangeLog
@@ -86,6 +86,9 @@ ToDo/Notes:
         - Fix fs/ntfs/aops.c::ntfs_{read,write}_block() to handle the case
           where a concurrent truncate has truncated the runlist under our feet.
         - Fix page_has_buffers()/page_buffers() handling in fs/ntfs/aops.c.
+        - In fs/ntfs/aops.c::ntfs_end_buffer_async_read(), use a bit spin lock
+          in the first buffer head instead of a driver global spin lock to
+          improve scalability.
 
 2.1.23 - Implement extension of resident files and make writing safe as well as
          many bug fixes, cleanups, and enhancements...