rework loss caused by dead desktop
use usecs rather than jiffies for spare_bandwidth_migration
dm-cache-target: stats, in_interupt BUG_ONs
dm-cache-target: fix type in remap_to_cache() for power of two calculation
dm-cache-target: avoid negation in remap_to_cache()
more tests
dm-cache-target: checl congestion whilst migrating
More timing tests
dm-cache-target: use function pointers instead of block_size_is_power_of_two() in the fast path
dm-cache-policy-basic: enhance threshold calculation
dm-cache-policy-basic: fastest version so far
dm-cache-target: latency calculation fix