freezer: shorten freezer sleep time using exponential backoff

All tasks can easily be frozen in under 10 ms, switch to using
an initial 1 ms sleep followed by exponential backoff until
8 ms.  Also convert the printed time to ms instead of centiseconds.

Change-Id: I7b198b16eefb623c2b0fc45dce50d9bca320afdc
Acked-by: Pavel Machek <>
Acked-by: Tejun Heo <>
Signed-off-by: Colin Cross <>
Signed-off-by: Rafael J. Wysocki <>
1 file changed