Re: [PATCH RFC idle] Make arm, sh, and x86 stop using RCU when idle

[Josh Triplett]

On Wed, Feb 01, 2012 at 04:42:53PM -0800, Paul E. McKenney wrote:
> RCU's shiny new diagnostics (thank you, Frederic!) for using RCU when idle
> located a few problems in arm, sh, and x86.  This patch series contains
> alleged fixes for these problems.  And they are real problems -- if RCU
> believes that the CPU is idle, it is ignoring it.  Which means that the
> idle CPU can say "rcu_read_lock()" all it like, but there will be no
> useful effect.

Having to put these calls down in every idle driver seems like such an
ugly layering violation.  Not that I have a better alternative to
suggest...

- Josh Triplett
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