Introduce squashfs compression threshold

If we can't beat that compression ratio for a single block then we leave
it uncompressed. The choice of the threshold depends on the cost of I/O
in a specific device which is determined from block I/O speed and CPU
speed.

BUG: 29058965
Change-Id: I8d17a4551c7d00ddb85687381b7cb0d6c60babf6
Signed-off-by: Mohamad Ayyash <mkayyash@google.com>
1 file changed