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authorGavin Shan <shangw@linux.vnet.ibm.com>2012-07-31 16:46:02 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-07-31 18:42:49 -0700
commit5b760e64a64c8940cdccd0ba6fce19a9bd010d20 (patch)
treeb4765cd744dd5710ba6cd4d784185247dc317cef /lib/is_single_threaded.c
parentb214514592d2dcb0b9d14ee8dd14f3699e3b0a84 (diff)
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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@linux.vnet.ibm.com> Reviewed-by: Michal Hocko <mhocko@suse.cz> Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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