Re: [PATCH V3 1/7] sched: Create sched_select_cpu() to givepreferred CPU for power saving

From: Peter Zijlstra
Date: Tue Mar 19 2013 - 08:30:51 EST

On Mon, 2013-03-18 at 20:53 +0530, Viresh Kumar wrote:
> +/*
> + * This routine returns the nearest non-idle cpu. It accepts a
> bitwise OR of
> + * SD_* flags present in linux/sched.h. If the local CPU isn't idle,
> it is
> + * returned back. If it is idle, then we must look for another CPU
> which have
> + * all the flags passed as argument as set.
> + */
> +int sched_select_cpu(unsigned int sd_flags)

So the only problem I have is that you expose the SD_flags to !sched
code. The only proposed user is in the workqueue code and passes 0.

Why not leave out the sd_flags argument and introduce it once you start
using it; at which point we can argue on the interface.

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