linux-kernel - Re: [PATCH] mm-slab: allocate kmem_cache with __GFP

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Date:	Thu, 21 Jul 2011 10:43:59 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Christoph Lameter <cl@...ux.com>
Cc:	Mel Gorman <mgorman@...e.de>, Pekka Enberg <penberg@...nel.org>,
	Konstantin Khlebnikov <khlebnikov@...nvz.org>,
	Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Matt Mackall <mpm@...enic.com>
Subject: Re: [PATCH] mm-slab: allocate kmem_cache with __GFP_REPEAT

Le mercredi 20 juillet 2011 à 09:52 -0500, Christoph Lameter a écrit :

> We should be making it a per cpu pointer like slub then. I looked at what
> it would take to do so a couple of month ago but it was quite invasive.
> 

I took a look at this too, but using percpu data would consume more
memory, because percpu allocator allocates memory blobs for all possible
cpus, while current code handles online/offline cpu nicely.



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