On Jan 7, 2018, at 5:55 PM, Jianbo Liu [off-list ref] wrote:

The 12/26/2017 20:28, Yongseok Koh wrote:

quoted

Instead of using system-wide 'dsb' instruction for IO barriers, 'dmb' is
sufficient and could bring better performance. Using 'dmb' with Outer
Shareable Domain option is also consistent with linux kernel.

But in kernel dsb is used for io barriers.
Do you consider adding dma_*mb?

Right. I'll send out a patchset, which adds rte_dma_rmb/wmb() today.

Thanks
Yongseok