linux-kernel - Re: [RFC, PATCH] SLAB : [NUMA] keep nodeid in struct page instead of struct slab

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Date:	Wed, 21 Mar 2007 17:47:13 +0200
From:	"Pekka Enberg" <penberg@...helsinki.fi>
To:	"Eric Dumazet" <dada1@...mosbay.com>
Cc:	"Christoph Lameter" <christoph@...eter.com>,
	"Andi Kleen" <andi@...stfloor.org>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"linux kernel" <linux-kernel@...r.kernel.org>
Subject: Re: [RFC, PATCH] SLAB : [NUMA] keep nodeid in struct page instead of struct slab

On 3/21/07, Eric Dumazet <dada1@...mosbay.com> wrote:
> Last time I checked 'struct page', they was no nodeid in it.

Hmm, page_to_nid() in include/linx/mm.h doesn't agree with you:

#ifdef NODE_NOT_IN_PAGE_FLAGS
extern int page_to_nid(struct page *page);
#else
static inline int page_to_nid(struct page *page)
{
        return (page->flags >> NODES_PGSHIFT) & NODES_MASK;
}
#endif
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