lkml.org 
[lkml]   [2018]   [Jul]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 4/4] arch/arm: Rebuild sched_domain hierarchy when cpu capacity changes
Date
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.

cc: Russell King <linux@armlinux.org.uk>

Signed-off-by: Morten Rasmussen <morten.rasmussen@arm.com>
---
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) { }
--
2.7.4
\
 
 \ /
  Last update: 2018-07-20 15:34    [W:0.142 / U:0.368 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site