Re: [PATCH] kernel/workqueue.c: better to free related resourceswhen failure occurs in wq_numa_init()

[Tejun Heo]

On Tue, May 14, 2013 at 08:25:20PM +0800, Chen Gang wrote:
> 
> When NUMA node mapping not available for one cpu, need disabling NUMA
> support and proceed.
> 
> Also better to release unused resources (the original code can not
> cause issue, only waste some memory).
> 
> 
> Signed-off-by: Chen Gang <gang.chen@xxxxxxxxxxx>
> ---
>  kernel/workqueue.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/kernel/workqueue.c b/kernel/workqueue.c
> index 1ae6028..a763079 100644
> --- a/kernel/workqueue.c
> +++ b/kernel/workqueue.c
> @@ -4911,6 +4911,9 @@ static void __init wq_numa_init(void)
>  		if (WARN_ON(node == NUMA_NO_NODE)) {
>  			pr_warn("workqueue: NUMA node mapping not available for cpu%d, disabling NUMA support\n", cpu);
>  			/* happens iff arch is bonkers, let's just proceed */
> +			for_each_node(node)
> +				free_cpumask_var(tbl[node]);
> +			kfree(tbl);

Eh... let's just leave it alone.  The path is taken iff the whole
thing is seriously broken and we're triggering WARN.  I don't think we
need to worry about small memory wastage there.

Thanks.

-- 
tejun
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/