Commit 5b760e64 authored by Gavin Shan's avatar Gavin Shan Committed by Linus Torvalds

mm/sparse: optimize sparse_index_alloc

With CONFIG_SPARSEMEM_EXTREME, the two levels of memory section
descriptors are allocated from slab or bootmem.  When allocating from
slab, let slab/bootmem allocator clear the memory chunk.  We needn't clear
it explicitly.
Signed-off-by: default avatarGavin Shan <shangw@linux.vnet.ibm.com>
Reviewed-by: default avatarMichal Hocko <mhocko@suse.cz>
Acked-by: default avatarDavid Rientjes <rientjes@google.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent b2145145
...@@ -65,14 +65,12 @@ static struct mem_section noinline __init_refok *sparse_index_alloc(int nid) ...@@ -65,14 +65,12 @@ static struct mem_section noinline __init_refok *sparse_index_alloc(int nid)
if (slab_is_available()) { if (slab_is_available()) {
if (node_state(nid, N_HIGH_MEMORY)) if (node_state(nid, N_HIGH_MEMORY))
section = kmalloc_node(array_size, GFP_KERNEL, nid); section = kzalloc_node(array_size, GFP_KERNEL, nid);
else else
section = kmalloc(array_size, GFP_KERNEL); section = kzalloc(array_size, GFP_KERNEL);
} else } else {
section = alloc_bootmem_node(NODE_DATA(nid), array_size); section = alloc_bootmem_node(NODE_DATA(nid), array_size);
}
if (section)
memset(section, 0, array_size);
return section; return section;
} }
......
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