Messages in this thread Patch in this message | | | Date | Mon, 10 Sep 2018 03:12:45 -0700 | From | tip-bot for Morten Rasmussen <> | Subject | [tip:sched/core] sched/topology, arch/arm: Rebuild sched_domain hierarchy when CPU capacity changes |
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Commit-ID: e1799a80a4f5a463f252b7325da8bb66dfd55471 Gitweb: https://git.kernel.org/tip/e1799a80a4f5a463f252b7325da8bb66dfd55471 Author: Morten Rasmussen <morten.rasmussen@arm.com> AuthorDate: Fri, 20 Jul 2018 14:32:34 +0100 Committer: Ingo Molnar <mingo@kernel.org> CommitDate: Mon, 10 Sep 2018 11:05:48 +0200
sched/topology, arch/arm: Rebuild sched_domain hierarchy when CPU capacity changes
Asymmetric CPU capacity can not necessarily be determined accurately at the time the initial sched_domain hierarchy is built during boot. It is therefore necessary to be able to force a full rebuild of the hierarchy later triggered by the arch_topology driver. A full rebuild requires the arch-code to implement arch_update_cpu_topology() which isn't yet implemented for arm. This patch points the arm implementation to arch_topology driver to ensure that full hierarchy rebuild happens when needed.
Signed-off-by: Morten Rasmussen <morten.rasmussen@arm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: dietmar.eggemann@arm.com Cc: valentin.schneider@arm.com Cc: vincent.guittot@linaro.org Link: http://lkml.kernel.org/r/1532093554-30504-5-git-send-email-morten.rasmussen@arm.com Signed-off-by: Ingo Molnar <mingo@kernel.org> --- arch/arm/include/asm/topology.h | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/arch/arm/include/asm/topology.h b/arch/arm/include/asm/topology.h index 5d88d2f22b2c..2a786f54d8b8 100644 --- a/arch/arm/include/asm/topology.h +++ b/arch/arm/include/asm/topology.h @@ -33,6 +33,9 @@ const struct cpumask *cpu_coregroup_mask(int cpu); /* Replace task scheduler's default cpu-invariant accounting */ #define arch_scale_cpu_capacity topology_get_cpu_scale +/* Enable topology flag updates */ +#define arch_update_cpu_topology topology_update_cpu_topology + #else static inline void init_cpu_topology(void) { }
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