On Thu, 2022-05-12 at 01:15 -0700, Wei Xu wrote: > > I am OK with moving back the memory tier nodelist into node/. When > there are more memory tier attributes needed, we can then create the > memory tier subtree and replace the tier nodelist in node/ with > symlinks. > > So the revised sysfs interfaces are: > > * /sys/devices/system/node/memory_tierN (read-only) > > where N = 0, 1, 2 > > Format: node_list > > * /sys/devices/system/node/nodeN/memory_tier (read/write) > > where N = 0, 1, ... > > Format: int or empty This looks good to me. Just wonder if having just 1 tier lower than DRAM is sufficient. We could have wide performance range for such secondary memories and is one tier sufficient for them? Tim
