linux-kernel - Re: [RFC][PATCH 1/5] mm/slab_common: allow NULL cache pointer in kmem_cache

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Message-ID: <20150716082643.GA622@swordfish>
Date:	Thu, 16 Jul 2015 17:26:43 +0900
From:	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
To:	Julia Lawall <julia.lawall@...6.fr>
Cc:	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
	David Rientjes <rientjes@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Minchan Kim <minchan@...nel.org>,
	Christoph Lameter <cl@...ux.com>,
	Pekka Enberg <penberg@...nel.org>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Michal Hocko <mhocko@...e.cz>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Subject: Re: [RFC][PATCH 1/5] mm/slab_common: allow NULL cache pointer in
 kmem_cache_destroy()

On (06/20/15 18:25), Julia Lawall wrote:
> > On (06/17/15 16:14), David Rientjes wrote:
> > [..]
> > > > 
> > > > Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@...il.com>
> > > > Reported-by: Andrew Morton <akpm@...ux-foundation.org>
> > > > LKML-reference: https://lkml.org/lkml/2015/6/8/583
> > > 
> > > Acked-by: David Rientjes <rientjes@...gle.com>
> > > 
> > > kmem_cache_destroy() isn't a fastpath, this is long overdue.  Now where's 
> > > the patch to remove the NULL checks from the callers? ;)
> > > 
> > 
> > Thanks.
> > 
> > Yes, Julia Lawall (Cc'd) already has a patch set ready for submission.
> 
> The patch for making these functions able to tolerate NULL doesn't seem to 
> be in linux-next yet, so I will wait until it appears.

Hello Julia,

The patches are in -next now.

mm/dmapool: 8bf49946ed8fa01a0b5e7d0de94655c072525344
mm/mempool: eb54bc8469e2977bcef4e284d24cbf3578ce9cd9
mm/slab_common: e88672f95907c14cf8ab2cce592c41bbb9cefc5f

	-ss
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