Re: [PATCH V2 Resend 4/4] timer: Migrate running timer

From: Peter Zijlstra
Date: Wed May 22 2013 - 05:07:10 EST

On Wed, May 22, 2013 at 02:04:16PM +0530, Viresh Kumar wrote:

> So, this is the clean draft for the idea I had.. (Naming is poor for
> now):
> diff --git a/include/linux/timer.h b/include/linux/timer.h
> index 8c5a197..ad00ebe 100644
> --- a/include/linux/timer.h
> +++ b/include/linux/timer.h
> @@ -20,6 +20,7 @@ struct timer_list {
> void (*function)(unsigned long);
> unsigned long data;
> + int wait_for_migration_to_complete;

If you play games with the alignment constraints of struct tvec_base you
can get extra low bits to play with for TIMER_FLAG_MASK. See struct
pool_workqueue for similar games.

That would avoid the struct bloat and I suppose make tglx happy :-)
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