Re: [PATCH 01/10] workqueue: add wq_numa_tbl_len and wq_numa_possible_cpumask[]

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On Wed, Mar 20, 2013 at 11:43:30PM +0800, Lai Jiangshan wrote:
> > +       for_each_node(node)
> > +               BUG_ON(!alloc_cpumask_var_node(&wq_numa_possible_cpumask[node],
> > +                                              GFP_KERNEL, node));
> > +       for_each_possible_cpu(cpu) {
> > +               node = cpu_to_node(cpu);
> > +               if (WARN_ON(node == NUMA_NO_NODE)) {
> > +                       pr_err("workqueue: NUMA node mapping not available for cpu%d, disabling NUMA support\n", cpu);
> 
> since you used WARN_ON(), not BUG_ON(), I think you need to free
> allocated memory here.

I don't know.  Is it necessary?  It shouldn't happen sans bugs in arch
code and we're vomiting warning message with full stack trace.  The
system will function but something is seriously screwed.  I don't
think it matters whether we free the puny number of bytes there or
not and I don't wanna nest deeper there. :P

-- 
tejun
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