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    SubjectRe: [PATCH] sched: support dynamiQ cluster
    On 28 March 2018 at 11:12, Will Deacon <will.deacon@arm.com> wrote:
    > On Wed, Mar 28, 2018 at 09:46:55AM +0200, Vincent Guittot wrote:

    >>
    >> The SD_ASYM_PACKING flag is disabled by default and I'm preparing another patch
    >> to enable this dynamically at boot time by detecting the system topology.
    >>
    >> arch/arm64/kernel/topology.c | 30 ++++++++++++++++++++++++++++++
    >> 1 file changed, 30 insertions(+)
    >>
    >> diff --git a/arch/arm64/kernel/topology.c b/arch/arm64/kernel/topology.c
    >> index 2186853..cb6705e5 100644
    >> --- a/arch/arm64/kernel/topology.c
    >> +++ b/arch/arm64/kernel/topology.c
    >> @@ -296,6 +296,33 @@ static void __init reset_cpu_topology(void)
    >> }
    >> }
    >>
    >> +#ifdef CONFIG_SCHED_MC
    >> +unsigned int __read_mostly arm64_sched_asym_enabled;
    >> +
    >> +int arch_asym_cpu_priority(int cpu)
    >> +{
    >> + return topology_get_cpu_scale(NULL, cpu);
    >> +}
    >> +
    >> +static inline int arm64_sched_dynamiq(void)
    >> +{
    >> + return arm64_sched_asym_enabled ? SD_ASYM_PACKING : 0;
    >> +}
    >> +
    >> +static int arm64_core_flags(void)
    >> +{
    >> + return cpu_core_flags() | arm64_sched_dynamiq();
    >> +}
    >> +#endif
    >> +
    >> +static struct sched_domain_topology_level arm64_topology[] = {
    >> +#ifdef CONFIG_SCHED_MC
    >> + { cpu_coregroup_mask, arm64_core_flags, SD_INIT_NAME(MC) },
    >
    > Maybe stick this in a macro to avoid the double #ifdef?

    ok, I will do that in next version

    Vincent

    >
    > Will

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