Messages in this thread | | | From | Michael Ellerman <> | Subject | Re: [PATCH v2 1/2] sched/topology: Allow archs to override cpu_smt_mask | Date | Thu, 17 Sep 2020 21:27:29 +1000 (AEST) |
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On Fri, 7 Aug 2020 13:15:16 +0530, Srikar Dronamraju wrote: > cpu_smt_mask tracks topology_sibling_cpumask. This would be good for > most architectures. One of the users of cpu_smt_mask(), would be to > identify idle-cores. On Power9, a pair of SMT4 cores can be presented by > the firmware as a SMT8 core for backward compatibility reasons. > > Powerpc allows LPARs to be live migrated from Power8 to Power9. Do note > Power8 had only SMT8 cores. Existing software which has been > developed/configured for Power8 would expect to see SMT8 core. > Maintaining the illusion of SMT8 core is a requirement to make that > work. > > [...]
Applied to powerpc/next.
[1/2] sched/topology: Allow archs to override cpu_smt_mask https://git.kernel.org/powerpc/c/3babbe447d76ac2919ec4d0eb3b0adfb22f5b03c [2/2] powerpc/topology: Override cpu_smt_mask https://git.kernel.org/powerpc/c/f3232321db58480804f80d59aeb651a5c859a200
cheers
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