On Thu, Nov 1, 2012 at 7:33 AM, Christoph Lameter <c...@linux.com> wrote: > 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.
Preemption is disabled in all of the places where writes are done and all of the reads are from foreign CPUs. _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
