From: Morten Rasmussen <morten.rasmussen@arm.com>
To: peterz@infradead.org, mingo@redhat.com
Cc: valentin.schneider@arm.com, dietmar.eggemann@arm.com,
vincent.guittot@linaro.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Morten Rasmussen <morten.rasmussen@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>
Subject: [PATCH 3/4] arch/arm64: Rebuild sched_domain hierarchy when cpu capacity changes
Date: Fri, 20 Jul 2018 14:32:33 +0100 [thread overview]
Message-ID: <1532093554-30504-4-git-send-email-morten.rasmussen@arm.com> (raw)
In-Reply-To: <1532093554-30504-1-git-send-email-morten.rasmussen@arm.com>
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 arm64. This patch points the arm64 implementation to
arch_topology driver to ensure that full hierarchy rebuild happens when
needed.
cc: Catalin Marinas <catalin.marinas@arm.com>
cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Morten Rasmussen <morten.rasmussen@arm.com>
---
arch/arm64/include/asm/topology.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/arm64/include/asm/topology.h b/arch/arm64/include/asm/topology.h
index df48212f767b..61ba09d48237 100644
--- a/arch/arm64/include/asm/topology.h
+++ b/arch/arm64/include/asm/topology.h
@@ -43,6 +43,9 @@ int pcibus_to_node(struct pci_bus *bus);
/* 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
+
#include <asm-generic/topology.h>
#endif /* _ASM_ARM_TOPOLOGY_H */
--
2.7.4
next prev parent reply other threads:[~2018-07-20 13:33 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-20 13:32 [PATCH 0/4] sched/topology: Set SD_ASYM_CPUCAPACITY flag automatically Morten Rasmussen
2018-07-20 13:32 ` [PATCH 1/4] sched/topology: SD_ASYM_CPUCAPACITY flag detection Morten Rasmussen
2018-07-23 13:25 ` Qais Yousef
2018-07-23 15:27 ` Morten Rasmussen
2018-07-23 16:07 ` Qais Yousef
2018-07-24 8:37 ` Morten Rasmussen
2018-07-24 8:59 ` Qais Yousef
2018-09-10 8:21 ` Ingo Molnar
2018-09-11 11:04 ` Morten Rasmussen
2018-09-10 10:11 ` [tip:sched/core] sched/topology: Add " tip-bot for Morten Rasmussen
2018-07-20 13:32 ` [PATCH 2/4] drivers/base/arch_topology: Rebuild sched_domain hierarchy when capacities change Morten Rasmussen
2018-09-10 10:11 ` [tip:sched/core] sched/topology, drivers/base/arch_topology: Rebuild the " tip-bot for Morten Rasmussen
2018-07-20 13:32 ` Morten Rasmussen [this message]
2018-09-10 10:12 ` [tip:sched/core] sched/topology, arch/arm64: Rebuild the sched_domain hierarchy when the CPU capacity changes tip-bot for Morten Rasmussen
2018-07-20 13:32 ` [PATCH 4/4] arch/arm: Rebuild sched_domain hierarchy when cpu " Morten Rasmussen
2018-09-10 10:12 ` [tip:sched/core] sched/topology, arch/arm: Rebuild sched_domain hierarchy when CPU " tip-bot for Morten Rasmussen
2018-07-31 10:53 ` [PATCH 0/4] sched/topology: Set SD_ASYM_CPUCAPACITY flag automatically Peter Zijlstra
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