linux-kernel - Re: [PATCH] small optimization to update_curr

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Message-ID: <f488382f0810310610n20a13163pb0936a3104e64a5c@mail.gmail.com>
Date:	Fri, 31 Oct 2008 06:10:13 -0700
From:	"Steven Noonan" <steven@...inklabs.net>
To:	"Dimitri Sivanich" <sivanich@....com>
Cc:	"Ingo Molnar" <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	"H. Peter Anvin" <hpa@...or.com>,
	"Thomas Gleixner" <tglx@...utronix.de>,
	"Andrew Morton" <akpm@...ux-foundation.org>
Subject: Re: [PATCH] small optimization to update_curr_rt

On Fri, Oct 31, 2008 at 6:03 AM, Dimitri Sivanich <sivanich@....com> wrote:
> A very minor improvement, but might it be better to check sched_rt_runtime(rt_rq)
> before taking the rt_runtime_lock?

Is it possible that the attribute sched_rt_runtime is checking could
change by the time it acquires the lock? If not, should be fine, I
think.

- Steven
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