Messages in this thread | | | Date | Thu, 1 Nov 2012 14:33:45 +0000 | From | Christoph Lameter <> | Subject | Re: [PATCH 4/9] net: openvswitch: use this_cpu_ptr per-cpu helper |
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On Thu, 1 Nov 2012, Shan Wei wrote:
> But for different field in same per-cpu variable, how to guarantee n_missed > and n_hit are from same cpu? > this_cpu_read(dp->stats_percpu->n_missed); > [processor changed] > this_cpu_read(dp->stats_percpu->n_hit);
What does current guarantee that? If it is guaranteed then you can use the __this_cpu_xxx ops.
> In addition, following usage of per_cpu_ptr can be replaced by this_cpu_read. > > cpu=get_cpu() > .... > *per_cpu_ptr(p,cpu) > .... > .... > put_cpu()
Right.
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