Re: [PATCH v5 8/8] sched/numa: drop unnecessary variable intask_weight

[Mel Gorman]

On Wed, Dec 11, 2013 at 08:50:01AM +0800, Wanpeng Li wrote:
> Drop unnecessary total_faults variable in function task_weight to unify
> task_weight and group_weight.
> 
> Reviewed-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
> Signed-off-by: Wanpeng Li <liwanp@xxxxxxxxxxxxxxxxxx>

Nak.

task_weight is called for tasks other than current. If p handles a fault
in parallel then it can drop to 0 between when it's checked and used to
divide resulting in an oops.

-- 
Mel Gorman
SUSE Labs
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