[PATCH 0/2] Replace nr_node_ids for loop with for_each_node

From: Raghavendra K T
Date: Tue Sep 08 2015 - 14:30:22 EST


Many places in the kernel use 'for' loop with nr_node_ids. For the architectures
which supports sparse numa ids, this will result in some unnecessary allocations
for non existing nodes.
(for e.g., numa node numbers such as 0,1,16,17 is common in powerpc.)

So replace the for loop with for_each_node so that allocations happen only for
existing numa nodes.

Please note that, though there are many places where nr_node_ids is used,
current patchset uses for_each_node only for slowpath to avoid find_next_bit
traversal.

Raghavendra K T (2):
mm: Replace nr_node_ids for loop with for_each_node in list lru
powerpc:numa Do not allocate bootmem memory for non existing nodes

arch/powerpc/mm/numa.c | 2 +-
mm/list_lru.c | 23 +++++++++++++++--------
2 files changed, 16 insertions(+), 9 deletions(-)

--
1.7.11.7

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