tree 1cbaf215961f3e797f2212f082c6752409bae1ca
parent 8efa7253b3fb8053c32f34c59826040839019224
author Jeffrey Kardatzke <jkardatzke@google.com> 1411064734 -0700
committer Jeffrey Kardatzke <jkardatzke@google.com> 1411166770 -0700

Pin block bitmaps in RAM based on mount option

This kernel patch was given to me by Ted Tso. This will
enable adding a mount option for the hard disk which will
then read all of the block bitmaps from the hard disk at mount
time and store them in RAM. This will avoid any slow calls to
fallocate since it won't need to seek around the disk to find free
blocks because all the data for that will already be in RAM.

The mount option for this is: pin_block_bitmaps

Change-Id: Id1682825c48267292f5ec635dd44becd0a92312c