On Wed, May 26, 2021 at 10:21:59PM +0800, Kai-Heng Feng wrote: > To be fair, resuming the NVMe from D3hot is much slower than keep it > at D0, which gives us a faster s2idle resume time. And now AMD also > requires s2idle on their latest laptops. We'd much prefer to use it, but due to the broken platforms we can't unfortunately. > And it's more like NVMe controllers don't respect PCI D3hot. What do you mean with that? > Because the NVMe continues to work after s2idle and the symbol is > rather subtle, so I suspect this is not platform or vendor specific. > Is it possible to disable DMA for HMB NVMe on suspend? Not in shipping products. The NVMe technical working group is working on a way to do that, but it will take a while until that shows up in products.
