Re: cpu_idle and cpu

To:	Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Subject:	Re: cpu_idle and cpu_wait
From:	Ralf Baechle <ralf@linux-mips.org>
Date:	Sun, 10 Sep 2006 02:18:03 +0200
Cc:	linux-mips@linux-mips.org
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On Thu, Jun 08, 2006 at 01:09:01AM +0900, Atsushi Nemoto wrote:

> [MIPS] reduce race between cpu_wait() and need_resched() checking
> 
> If a thread became runnable between need_resched() and the WAIT
> instruction, switching to the thread will delay until a next interrupt.
> Some CPUs can execute the WAIT instruction with interrupt disabled, so
> we can get rid of this race on them (at least UP case).

Applied but based on feedback from the 4K and 5K CPU designers I modified
your patch to continue using the old code.

  Ralf

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Re: cpu_idle and cpu_wait