On Fri, 2012-11-09 at 20:08 +0000, Christoph Lameter wrote:
> On Fri, 9 Nov 2012, Shan Wei wrote:
>
> > diff --git a/net/core/flow.c b/net/core/flow.c
> > index e318c7e..b0901ee 100644
> > --- a/net/core/flow.c
> > +++ b/net/core/flow.c
> > @@ -327,11 +327,9 @@ static void flow_cache_flush_tasklet(unsigned long
> > data)
> > static void flow_cache_flush_per_cpu(void *data)
> > {
> > struct flow_flush_info *info = data;
> > - int cpu;
> > struct tasklet_struct *tasklet;
> >
> > - cpu = smp_processor_id();
> > - tasklet = &per_cpu_ptr(info->cache->percpu, cpu)->flush_tasklet;
> > + tasklet = this_cpu_ptr(&info->cache->percpu->flush_tasklet);
> > tasklet->data = (unsigned long)info;
>
> this_cpu_write(info->cache->percpu->flush_tasklet->data, (unsigned
> long)info);
>
> should also do the trick in less instructions and get rid of all temporary
> variables as well.
Its not the case.
We need the _pointer_ to call :
tasklet_schedule(tasklet);
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