linux-kernel - Re: [PATCH -mm v2 1/3] slub: never fail to shrink cache

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Message-ID: <20150128173221.GA16011@esperanza>
Date:	Wed, 28 Jan 2015 20:32:21 +0300
From:	Vladimir Davydov <vdavydov@...allels.com>
To:	Christoph Lameter <cl@...ux.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Pekka Enberg <penberg@...nel.org>,
	David Rientjes <rientjes@...gle.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Michal Hocko <mhocko@...e.cz>, <linux-mm@...ck.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -mm v2 1/3] slub: never fail to shrink cache

On Wed, Jan 28, 2015 at 10:37:09AM -0600, Christoph Lameter wrote:
> On Wed, 28 Jan 2015, Vladimir Davydov wrote:
> 
> > +			/* We do not keep full slabs on the list */
> > +			BUG_ON(free <= 0);
> 
> Well sorry we do actually keep a number of empty slabs on the partial
> lists. See the min_partial field in struct kmem_cache.

It's not about empty slabs, it's about full slabs: free == 0 means slab
is full.

Thanks,
Vladimir
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