On Oct 1 10:30, Keith Busch wrote: > On Thu, Oct 01, 2020 at 07:18:37PM +0200, Klaus Jensen wrote: > > OK, so I agree that it makes sense for it to be supported on a per > > namespace basis, but I think the spec is just keeping the door open for > > future namespace specific stuff in the log page - currently there is > > none. > > > > Figure 94 (the actual SMART log page) says that the Data Units > > Read/Written are controller wide, so there really is no namespace > > specific information. Maybe this could be in the context of shared > > namespaces? How would a controller know how much data has been > > read/written from it without asking the other controllers? What if a > > controller is detached from the namespace - you'd lose those numbers. > > That text is wrong. There is no "controller" scope to the smart log. > Figure 191 says the smart scope is to the subsystem or the namespace. It > doesn't matter which controller performed an IO to a particular > namespace; the log needs to report the same information regardless of > which controller you query. How that is coordinated within the subsystem > is a detail not defined by spec. >
Oh! Thats new in v1.4. So they updated that, but forgot figure 194. In v1.3 it is controller and namespace scope. Anyway, fair enough. In that case, Reviewed-by: Klaus Jensen <k.jen...@samsung.com>
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