tree b2ace00c27553ec2a10958e17d6b90ea264d5886
parent 40431d6c1288793a682fc6f5e5b5c9d5cac34608
author Chris Mason <chris.mason@oracle.com> 1249504605 -0400
committer Chris Mason <chris.mason@oracle.com> 1252690264 -0400

Btrfs: keep irqs on more often in the worker threads

The btrfs worker thread spinlock was being used both for the
queueing of IO and for the processing of ordered events.

The ordered events never happen from end_io handlers, and so they
don't need to use the _irq version of spinlocks.  This adds a
dedicated lock to the ordered lists so they don't have to run
with irqs off.

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