mm/page_alloc.c: refine the calculation of highest possible node id

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nr_node_ids records the highest possible node id, which is calculated by
scanning the bitmap node_states[N_POSSIBLE].  Current implementation
scan the bitmap from the beginning, which will scan the whole bitmap.

This patch reverses the order by scanning from the end with
find_last_bit().

Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com>
Cc: Tejun Heo <tj@kernel.org>
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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Wei Yang 2015-09-08 14:59:48 -07:00 • committed by Linus Torvalds

parent 52a2b53ffd

commit 904a9553d4

1 changed files with 2 additions and 4 deletions

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mm/page_alloc.c

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