From: Ralf Baechle <ralf@linux-mips.org>
To: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: linux-mips@linux-mips.org
Subject: Re: cpu_idle and cpu_wait
Date: Sun, 10 Sep 2006 02:18:03 +0200 [thread overview]
Message-ID: <20060910001803.GA826@linux-mips.org> (raw)
In-Reply-To: <20060608.010901.108121387.anemo@mba.ocn.ne.jp>
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
next prev parent reply other threads:[~2006-09-10 0:17 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-16 16:19 cpu_idle and cpu_wait Atsushi Nemoto
2005-11-16 18:42 ` Ralf Baechle
2005-11-17 2:21 ` Atsushi Nemoto
2005-11-17 7:08 ` Atsushi Nemoto
2005-11-18 3:22 ` Atsushi Nemoto
2006-06-07 16:09 ` Atsushi Nemoto
2006-09-10 0:18 ` Ralf Baechle [this message]
2006-09-10 12:52 ` Atsushi Nemoto
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