On Tue 05-12-23 01:26:07, Srinivasulu Thanneeru wrote: > > > On 12/4/2023 9:13 PM, Michal Hocko wrote: > > CAUTION: EXTERNAL EMAIL. Do not click links or open attachments unless you recognize the sender and were expecting this message. > > > > > > On Fri 01-12-23 03:34:20, sthanneeru.opensrc@xxxxxxxxxx wrote: > > > From: Srinivasulu Thanneeru <sthanneeru.opensrc@xxxxxxxxxx> > > > > > > The memory tiers feature allows nodes with similar memory types > > > or performance characteristics to be grouped together in a > > > memory tier. However, there is currently no provision for > > > moving a node from one tier to another on demand. > > > > Could you expand on why this is really needed/necessary? What is the > > actual usecase? > > Hi Michal Hock, > > Following two use-cases we have observed. > 1. It is not accurate to group similar memory types in the same tier, > because even similar memory types may have different speed grades. Presumably they are grouped based on a HW configuration. Does that mean that the configuration is wrong? Are you trying to workaround that by this interface? > 2. Some systems boots up with CXL devices and DRAM on the same memory-tier, > we need a way to move the CXL nodes to the correct tier from the user space. Again, could you expand a bit more and explain why this cannot be configured automatically? -- Michal Hocko SUSE Labs
