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

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Message-ID: <Pine.LNX.4.64.0805090923550.18195@schroedinger.engr.sgi.com>
Date:	Fri, 9 May 2008 09:25:41 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Heiko Carstens <heiko.carstens@...ibm.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.

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?


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