On Mon, 2 Jul 2012, Gavin Shan wrote:
> diff --git a/mm/sparse.c b/mm/sparse.c
> index 781fa04..a6984d9 100644
> --- a/mm/sparse.c
> +++ b/mm/sparse.c
> @@ -75,6 +75,20 @@ static struct mem_section noinline __init_refok *sparse_index_alloc(int nid)
> return section;
> }
>
> +static inline void __meminit sparse_index_free(struct mem_section *section)
> +{
> + unsigned long size = SECTIONS_PER_ROOT *
> + sizeof(struct mem_section);
> +
> + if (!section)
> + return;
> +
> + if (slab_is_available())
> + kfree(section);
> + else
> + free_bootmem(virt_to_phys(section), size);
Eek, does that work?
> +}
> +
> static int __meminit sparse_index_init(unsigned long section_nr, int nid)
> {
> static DEFINE_SPINLOCK(index_init_lock);
> @@ -102,6 +116,9 @@ static int __meminit sparse_index_init(unsigned long section_nr, int nid)
> mem_section[root] = section;
> out:
> spin_unlock(&index_init_lock);
> + if (ret)
> + sparse_index_free(section);
> +
> return ret;
> }
> #else /* !SPARSEMEM_EXTREME */
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