netdev - Re: [PATCH 6/7] slub: improve bulk alloc strategy

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Message-ID: <alpine.DEB.2.11.1506151135130.20358@east.gentwo.org>
Date:	Mon, 15 Jun 2015 11:36:40 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Jesper Dangaard Brouer <brouer@...hat.com>
cc:	linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
	netdev@...r.kernel.org, Alexander Duyck <alexander.duyck@...il.com>
Subject: Re: [PATCH 6/7] slub: improve bulk alloc strategy

On Mon, 15 Jun 2015, Jesper Dangaard Brouer wrote:

> -			break;
> +		if (unlikely(!object)) {
> +			c->tid = next_tid(c->tid);

tid increment is not needed here since the per cpu information is not
modified.

> +			local_irq_enable();
> +
> +			/* Invoke slow path one time, then retry fastpath
> +			 * as side-effect have updated c->freelist
> +			 */
> +			p[i] = __slab_alloc(s, flags, NUMA_NO_NODE,
> +					    _RET_IP_, c);
> +			if (unlikely(!p[i])) {
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