答复: KVM guest sometimes failed to boot because of kernel stackoverflow if KPTI is enabled on a hisilicon ARM64 platform.

On Thu, Jun 28, 2018 at 04:08:24PM +0000, Wangxuefeng (E) wrote:

Hi, mark
     Your means is that DMB must  make sure the completion of prior load/store
or CMO  and make sure the data is visible to all obsevers (no matter device or
cacheable).   DMB not only keep order?

Not quite -- DMB does not guarantee completion.

However, DMB must guarantee that loads/stores and CMOs are ordered on
the bus, all the way to the PoC.

Thanks,
Mark.