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