linux-kernel - Re: [PATCH -mm v2 8/8] slab: make dead memcg caches discard free slabs immediately

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Message-ID: <alpine.DEB.2.10.1406100925270.17142@gentwo.org>
Date:	Tue, 10 Jun 2014 09:26:19 -0500 (CDT)
From:	Christoph Lameter <cl@...two.org>
To:	Vladimir Davydov <vdavydov@...allels.com>
cc:	Joonsoo Kim <iamjoonsoo.kim@....com>, akpm@...ux-foundation.org,
	rientjes@...gle.com, penberg@...nel.org, hannes@...xchg.org,
	mhocko@...e.cz, linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH -mm v2 8/8] slab: make dead memcg caches discard free
 slabs immediately

On Tue, 10 Jun 2014, Vladimir Davydov wrote:

> Frankly, I incline to shrinking dead SLAB caches periodically from
> cache_reap too, because it looks neater and less intrusive to me. Also
> it has zero performance impact, which is nice.
>
> However, Christoph proposed to disable per cpu arrays for dead caches,
> similarly to SLUB, and I decided to give it a try, just to see the end
> code we'd have with it.
>
> I'm still not quite sure which way we should choose though...

Which one is cleaner?

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