Hi Kelvin. On 30 April 2014 10:52, <kelvin...@via-alliance.com> wrote: > In arch/arm64/include/asm/barrier.h, there is the definition of > smp_mb()/smp_rmb()/smp_wmb() for arm64. I noticed that all the 3 macors are > using “dmb ishxx”, which is only affect the cluster of the CPU executing the > instruction.
This is incorrect. > But in the big.LITTLE system, there will be 2 cluster. So the > smp_mb()/smp_rmb()/smp_wmb() cannot affect all the CPU in the system. Yes, they do. In a big.LITTLE HMP system, all participating CPUs are part of the inner-shareable domain. Regards, Leif _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
