Re: [PATCH] ARM: mm: Regarding section when dealing with meminfo

From: Dave Hansen
Date: Mon Jan 24 2011 - 13:48:10 EST

On Mon, 2011-01-24 at 17:58 +0000, Russell King - ARM Linux wrote:
> Wrong. For flatmem, we have a pfn_valid() which is backed by doing a
> one, two or maybe rarely three compare search of the memblocks. Short
> of having a bitmap of every page in the 4GB memory space, you can't
> get more efficient than that.

Sweet. So, we can just take the original patch that started this
conversation, add the requisite pfn_valid()s and pfn_to_page()s, and
skip the sparsemem #ifdefs. Right?

-- Dave

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at