linux-kernel - Re: [PATCH] sparsemem vmemmap: initialize memmap.

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Message-ID: <20080509170111.GA7248@osiris.boeblingen.de.ibm.com>
Date:	Fri, 9 May 2008 19:01:11 +0200
From:	Heiko Carstens <heiko.carstens@...ibm.com>
To:	Christoph Lameter <clameter@....com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Andy Whitcroft <apw@...dowen.org>,
	Gerald Schaefer <gerald.schaefer@...ibm.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH] sparsemem vmemmap: initialize memmap.

On Fri, May 09, 2008 at 09:25:41AM -0700, Christoph Lameter wrote:
> Nack. vmemmap_alloc_block does 
> 
> void * __meminit vmemmap_alloc_block(unsigned long size, int node)
> {
>         /* If the main allocator is up use that, fallback to bootmem. */
>         if (slab_is_available()) {
>                 struct page *page = alloc_pages_node(node,
>                                 GFP_KERNEL | __GFP_ZERO, get_order(size));
>                 if (page)
>                         return page_address(page);
>                 return NULL;
>         } else
>                 return __earlyonly_bootmem_alloc(node, size, size,
>                                 __pa(MAX_DMA_ADDRESS));
> }
> 
> memory is always zeroed. Maybe you use an alternate implementation that is 
> broken?

Yes, I missed the __GFP_ZERO. Already figured out and fixed in arch code.

Thanks ;)
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