linux-kernel - Re: [patch] SLQB slab allocator

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Message-ID: <20090123125508.GG19986@wotan.suse.de>
Date:	Fri, 23 Jan 2009 13:55:08 +0100
From:	Nick Piggin <npiggin@...e.de>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Pekka Enberg <penberg@...helsinki.fi>,
	Linux Memory Management List <linux-mm@...ck.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Lin Ming <ming.m.lin@...el.com>,
	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>,
	Christoph Lameter <clameter@...r.sgi.com>
Subject: Re: [patch] SLQB slab allocator

On Fri, Jan 23, 2009 at 10:55:26AM +0100, Andi Kleen wrote:
> Nick Piggin <npiggin@...e.de> writes:
> > +#ifdef CONFIG_NUMA
> > +void *__kmalloc_node(size_t size, gfp_t flags, int node);
> > +void *kmem_cache_alloc_node(struct kmem_cache *, gfp_t flags, int node);
> > +
> > +static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node)
> 
> kmalloc_node should be infrequent, i suspect it can be safely out of lined.

Hmm, it only takes up another couple of hundred bytes for a full
numa kernel. Completely out of lining it can take a slightly slower
path and makes the code slightly different from the kmalloc case.
So I'll leave this change for now.

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