Messages in this thread Patch in this message | | | From | Wei Yang <> | Subject | [PATCH 1/3] percpu: stop the loop when a cpu belongs to a new group | Date | Mon, 21 Oct 2013 16:58:11 +0800 |
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When a cpu belongs to a new group, there is no cpu has the same group id. This means it can be assigned a new group id without checking with every others.
This patch does this optimiztion.
Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com> --- mm/percpu.c | 5 ++++- 1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/mm/percpu.c b/mm/percpu.c index 8c8e08f..536ca4f 100644 --- a/mm/percpu.c +++ b/mm/percpu.c @@ -1488,7 +1488,10 @@ static struct pcpu_alloc_info * __init pcpu_build_alloc_info( (cpu_distance_fn(cpu, tcpu) > LOCAL_DISTANCE || cpu_distance_fn(tcpu, cpu) > LOCAL_DISTANCE)) { group++; - nr_groups = max(nr_groups, group + 1); + if (group == nr_groups) { + nr_groups++; + break; + } goto next_group; } } -- 1.7.5.4
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