Re: [patch 02/10] mm: bootmem: remove redundant offset check when finally freeing bootmem

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On Mon, May 07, 2012 at 01:37:44PM +0200, Johannes Weiner wrote:
> When bootmem releases an unaligned BITS_PER_LONG pages chunk of memory
> to the page allocator, it checks the bitmap if there are still
> unreserved pages in the chunk (set bits), but also if the offset in
> the chunk indicates BITS_PER_LONG loop iterations already.
> But since the consulted bitmap is only a one-word-excerpt of the full
> per-node bitmap, there can not be more than BITS_PER_LONG bits set in
> it.  The additional offset check is unnecessary.
> Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>

Acked-by: Tejun Heo <tj@xxxxxxxxxx>



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