tree 03e1c3c261d71b1f0c18a0e785cbb311de8ab0c0
parent 40a8df2afea8009142f6ff635956f05b2801dd00
author Jeff Brown <jeffbrown@google.com> 1330578761 -0800
committer Jeff Brown <jeffbrown@google.com> 1330579568 -0800

Use fdatasync() to improve performance.

Linux has a working fdatasync() so we should use it!
This change alone improves performance by around 20% by reducing
the number of synchronous I/O writes of irrelevant metadata
changes.

Change-Id: Iebe0c32a7e018ec0ced2347b7d62b2b7dc5aa376