>> 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?
>
David, I think it's working fine. If my understanding is wrong, please
correct me. Thanks a lot :-)
The "section" allocated from the bootmem allocator might take following
function call path. In the function alloc_bootmem_core(), all online nodes
will be checked for the memory allocation. So we could have memory allocated
from different node other than the specified one to alloc_bootmem_node()
alloc_bootmem_node(nid, size)
__alloc_bootmem_node()
___alloc_bootmem_node_nopanic()
alloc_bootmem_core()
On the other hand, function free_bootmem() checks which node the memory
block belongs to and then free it into that node. That looks reasonable.
Thanks,
Gavin
>> +}
>> +
>> 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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