From: tip-bot for Morten Rasmussen <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
Cc: linux@armlinux.org.uk, hpa@zytor.com, tglx@linutronix.de,
mingo@kernel.org, morten.rasmussen@arm.com,
torvalds@linux-foundation.org, linux-kernel@vger.kernel.org,
peterz@infradead.org
Subject: [tip:sched/core] sched/topology, arch/arm: Rebuild sched_domain hierarchy when CPU capacity changes
Date: Mon, 10 Sep 2018 03:12:45 -0700 [thread overview]
Message-ID: <tip-e1799a80a4f5a463f252b7325da8bb66dfd55471@git.kernel.org> (raw)
In-Reply-To: <1532093554-30504-5-git-send-email-morten.rasmussen@arm.com>
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) { }
next prev parent reply other threads:[~2018-09-10 10:13 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 ` [PATCH 3/4] arch/arm64: Rebuild sched_domain hierarchy when cpu capacity changes Morten Rasmussen
2018-09-10 10:12 ` [tip:sched/core] sched/topology, arch/arm64: Rebuild the sched_domain hierarchy when the CPU " 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-bot for Morten Rasmussen [this message]
2018-07-31 10:53 ` [PATCH 0/4] sched/topology: Set SD_ASYM_CPUCAPACITY flag automatically Peter Zijlstra
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