Re: [patch 1/2] add ALL_CPUS option to stop_machine_run()

[Max Krasnyanskiy <maxk@qualcomm.com>]

Jason Baron wrote:
> -allow stop_mahcine_run() to call a function on all cpus. Calling 
>  stop_machine_run() with a 'ALL_CPUS' invokes this new behavior.
>  stop_machine_run() proceeds as normal until the calling cpu has
>  invoked 'fn'. Then, we tell all the other cpus to call 'fn'.
> 

Jason, we're actually trying to reduce the usage of the stop_machine in 
general. It's a very big hammer that kills latencies and stuff. It'd be nice 
if we did not introduce any more dependencies on it. I guess in some case 
there is simply no other way to handle what need to do. But please think twice
(or more :)).

Max