linux-kernel - RE: [PATCH 1/3] slub: set a criteria for slub node partial adding

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Date:	Wed, 14 Dec 2011 08:47:36 +0200 (EET)
From:	Pekka Enberg <penberg@...nel.org>
To:	Eric Dumazet <eric.dumazet@...il.com>
cc:	"Alex,Shi" <alex.shi@...el.com>,
	David Rientjes <rientjes@...gle.com>,
	Christoph Lameter <cl@...ux.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>
Subject: RE: [PATCH 1/3] slub: set a criteria for slub node partial adding

On Wed, 14 Dec 2011, Eric Dumazet wrote:
> We should try to batch things a bit, instead of doing a very small unit
> of work in slow path.
>
> We now have a very fast fastpath, but inefficient slow path.
>
> SLAB has a litle cache per cpu, we could add one to SLUB for freed
> objects, not belonging to current slab. This could avoid all these
> activate/deactivate overhead.

Yeah, this is definitely worth looking at.

 			Pekka
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