The patch titled
Subject: mm/sparse: optimize sparse_index_alloc
has been added to the -mm tree. Its filename is
mm-sparse-optimize-sparse_index_alloc.patch
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From: Gavin Shan <shangw@xxxxxxxxxxxxxxxxxx>
Subject: 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: Gavin Shan <shangw@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Michal Hocko <mhocko@xxxxxxx>
Acked-by: David Rientjes <rientjes@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/sparse.c | 10 ++++------
1 file changed, 4 insertions(+), 6 deletions(-)
diff -puN mm/sparse.c~mm-sparse-optimize-sparse_index_alloc mm/sparse.c
--- a/mm/sparse.c~mm-sparse-optimize-sparse_index_alloc
+++ a/mm/sparse.c
@@ -65,14 +65,12 @@ static struct mem_section noinline __ini
if (slab_is_available()) {
if (node_state(nid, N_HIGH_MEMORY))
- section = kmalloc_node(array_size, GFP_KERNEL, nid);
+ section = kzalloc_node(array_size, GFP_KERNEL, nid);
else
- section = kmalloc(array_size, GFP_KERNEL);
- } else
+ section = kzalloc(array_size, GFP_KERNEL);
+ } else {
section = alloc_bootmem_node(NODE_DATA(nid), array_size);
-
- if (section)
- memset(section, 0, array_size);
+ }
return section;
}
_
Subject: Subject: mm/sparse: optimize sparse_index_alloc
Patches currently in -mm which might be from shangw@xxxxxxxxxxxxxxxxxx are
linux-next.patch
mm-slab-remove-duplicate-check.patch
mm-buddy-cleanup-on-should_fail_alloc_page.patch
mm-compaction-cleanup-on-compaction_deferred.patch
memcg-add-mem_cgroup_from_css-helper.patch
memcg-add-mem_cgroup_from_css-helper-fix.patch
memcg-add-mem_cgroup_from_css-helper-fix-2.patch
mm-sparse-optimize-sparse_index_alloc.patch
mm-sparse-more-check-on-mem_section-number.patch
mm-sparse-remove-index_init_lock.patch
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