Messages in this thread Patch in this message | | | From | Srikar Dronamraju <> | Subject | [PATCH v2 04/10] powerpc/smp: Enable small core scheduling sooner | Date | Tue, 21 Jul 2020 17:08:08 +0530 |
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Enable small core scheduling as soon as we detect that we are in a system that supports thread group. Doing so would avoid a redundant check.
Cc: linuxppc-dev <linuxppc-dev@lists.ozlabs.org> Cc: LKML <linux-kernel@vger.kernel.org> Cc: Michael Ellerman <michaele@au1.ibm.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Valentin Schneider <valentin.schneider@arm.com> Cc: Nick Piggin <npiggin@au1.ibm.com> Cc: Oliver OHalloran <oliveroh@au1.ibm.com> Cc: Nathan Lynch <nathanl@linux.ibm.com> Cc: Michael Neuling <mikey@linux.ibm.com> Cc: Anton Blanchard <anton@au1.ibm.com> Cc: Gautham R Shenoy <ego@linux.vnet.ibm.com> Cc: Vaidyanathan Srinivasan <svaidy@linux.ibm.com> Cc: Jordan Niethe <jniethe5@gmail.com> Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> --- Changelog v1 -> v2: powerpc/smp: Enable small core scheduling sooner Restored the previous info msg (Jordan) Moved big core topology fixup to fixup_topology (Gautham)
arch/powerpc/kernel/smp.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-)
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c index 1ce95da00cb6..72f16dc0cb26 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -1370,6 +1370,16 @@ int setup_profiling_timer(unsigned int multiplier) return 0; } +static void fixup_topology(void) +{ +#ifdef CONFIG_SCHED_SMT + if (has_big_cores) { + pr_info("Big cores detected but using small core scheduling\n"); + powerpc_topology[0].mask = smallcore_smt_mask; + } +#endif +} + void __init smp_cpus_done(unsigned int max_cpus) { /* @@ -1383,12 +1393,7 @@ void __init smp_cpus_done(unsigned int max_cpus) dump_numa_cpu_topology(); -#ifdef CONFIG_SCHED_SMT - if (has_big_cores) { - pr_info("Big cores detected but using small core scheduling\n"); - powerpc_topology[0].mask = smallcore_smt_mask; - } -#endif + fixup_topology(); set_sched_topology(powerpc_topology); } -- 2.17.1
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