commit 35d8ba66294ff2a53c17337a1aa1ff6739492f41
author Chris Mason <chris.mason@oracle.com> Wed Jun 11 20:21:24 2008 -0400
committer Chris Mason <chris.mason@oracle.com> Thu Sep 25 11:04:03 2008 -0400
tree 40297c7917bb0425e76030e54418a934b1225299
parent d05e5a4dad985acc938e62d9752c813647dedd9d

Btrfs: Worker thread optimizations

This changes the worker thread pool to maintain a list of idle threads,
avoiding a complex search for a good thread to wake up.

Threads have two states:

idle - we try to reuse the last thread used in hopes of improving the batching
ratios

busy - each time a new work item is added to a busy task, the task is
rotated to the end of the line.

Signed-off-by: Chris Mason <chris.mason@oracle.com>