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Date: Fri, 14 Feb 2014 14:19:59 +0100
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Nicholas Mc Guire <der.herr@hofr.at>
Cc: linux-rt-users@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>,
        Steven Rostedt <rostedt@goodmis.org>,
        Peter Zijlstra <peterz@infradead.org>, Carsten Emde <C.Emde@osadl.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Andreas Platschek <platschek@ict.tuwien.ac.at>
Subject: Re: [PATCH RT 4/5] allow preemption in
 mem_cgroup_move_account_page_stat
Message-ID: <20140214131959.GG28438@linutronix.de>
References: <20140210153933.GE20017@opentech.at>
 <20140214131705.GF28438@linutronix.de>
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* Sebastian Andrzej Siewior | 2014-02-14 14:17:05 [+0100]:

>Now, that I look at it again. Isn't it more efficient to keep preemption
>disabled for this very short time instead instead of invoking
>migrate_disable() which includes preempt_disable()/enable() and a few
>more opcodes…
>Therefore, I drop it again.

I think doing the same for the 1/5 of this series since it also disables
migration for a handfull of asm opcodes.

Sebastian