linux-kernel - Re: [PATCH -mm 2/3] slab: zap kmem_cache

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Message-ID: <20150126170418.GC28978@esperanza>
Date:	Mon, 26 Jan 2015 20:04:18 +0300
From:	Vladimir Davydov <vdavydov@...allels.com>
To:	Christoph Lameter <cl@...ux.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Pekka Enberg <penberg@...nel.org>,
	David Rientjes <rientjes@...gle.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Johannes Weiner <hannes@...xchg.org>,
	Michal Hocko <mhocko@...e.cz>, <linux-mm@...ck.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -mm 2/3] slab: zap kmem_cache_shrink return value

On Mon, Jan 26, 2015 at 09:49:47AM -0600, Christoph Lameter wrote:
> On Mon, 26 Jan 2015, Vladimir Davydov wrote:
> 
> > @@ -2400,11 +2400,16 @@ int __kmem_cache_shrink(struct kmem_cache *cachep)
> >  	return (ret ? 1 : 0);
> >  }
> >
> > +void __kmem_cache_shrink(struct kmem_cache *cachep)
> > +{
> > +	__cache_shrink(cachep);
> > +}
> > +
> 
> Why do we need this wrapper? Rename __cache_shrink to __kmem_cache_shrink
> instead?
> 

__cache_shrink() is used not only in __kmem_cache_shrink(), but also in
SLAB's __kmem_cache_shutdown(), where we do need its return value to
check if the cache is empty.

Thanks,
Vladimir
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