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
Date: Fri, 14 Feb 2014 14:19:59 +0100 [thread overview]
Message-ID: <20140214131959.GG28438@linutronix.de> (raw)
In-Reply-To: <20140214131705.GF28438@linutronix.de>
* 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
next prev parent reply other threads:[~2014-02-14 13:19 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-10 15:39 [PATCH RT 4/5] allow preemption in mem_cgroup_move_account_page_stat Nicholas Mc Guire
2014-02-14 13:09 ` Sebastian Andrzej Siewior
2014-02-14 13:17 ` Sebastian Andrzej Siewior
2014-02-14 13:19 ` Sebastian Andrzej Siewior [this message]
2014-02-14 15:30 ` Nicholas Mc Guire
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