linux-kernel - Re: [PATCH 4/5] mm: rework do_pages_move() to work on page

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Message-ID: <48F79B42.3070106@linux-foundation.org>
Date:	Thu, 16 Oct 2008 14:51:30 -0500
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Brice Goglin <Brice.Goglin@...ia.fr>
CC:	LKML <linux-kernel@...r.kernel.org>, linux-mm@...ck.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Nathalie Furmento <nathalie.furmento@...ri.fr>
Subject: Re: [PATCH 4/5] mm: rework do_pages_move() to work on page_sized
 chunks

Brice Goglin wrote:

> +	err = -ENOMEM;
> +	pm = kmalloc(PAGE_SIZE, GFP_KERNEL);
> +	if (!pm)

ok.... But if you need a page sized chunk then you can also do
	get_zeroed_page(GFP_KERNEL). Why bother the slab allocator for page 		sized
allocations?


> +	chunk_nr_pages = PAGE_SIZE/sizeof(struct page_to_node) - 1;

Blanks missing.



> +		/* fill the chunk pm with addrs and nodes from user-space */
> +		for (j = 0; j < chunk_nr_pages; j++) {

j? So the chunk_start used to be i?


Acked-by: Christoph Lameter <cl@...ux-foundation.org>
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