netdev - Re: [RFC PATCH] slub: RFC: Improving SLUB performance with 38% on NO-PREEMPT

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Message-ID: <alpine.DEB.2.11.1506080438570.10781@east.gentwo.org>
Date:	Mon, 8 Jun 2015 04:39:38 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Jesper Dangaard Brouer <brouer@...hat.com>
cc:	Eric Dumazet <eric.dumazet@...il.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Alexander Duyck <alexander.duyck@...il.com>,
	linux-mm@...ck.org, netdev@...r.kernel.org
Subject: Re: [RFC PATCH] slub: RFC: Improving SLUB performance with 38% on
 NO-PREEMPT

On Mon, 8 Jun 2015, Jesper Dangaard Brouer wrote:

> My real question is if disabling local interrupts is enough to avoid this?

Yes the initial release of slub used interrupt disable in the fast paths.

> And, does local irq disabling also stop preemption?

Of course.

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