From: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
To: rjw@rjwysocki.net, tglx@linutronix.de, mingo@redhat.com,
bp@suse.de, peterz@infradead.org
Cc: x86@kernel.org, linux-pm@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org,
tim.c.chen@linux.intel.com,
Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Subject: [PATCH v2 4/8] sched, x86: use arch_update_cpu_topology to indicate x86 need sched domain rebuild
Date: Thu, 1 Sep 2016 13:33:40 -0700 [thread overview]
Message-ID: <1472762024-88771-5-git-send-email-srinivas.pandruvada@linux.intel.com> (raw)
In-Reply-To: <1472762024-88771-1-git-send-email-srinivas.pandruvada@linux.intel.com>
From: Tim Chen <tim.c.chen@linux.intel.com>
Provides x86 with arch_update_cpu_topology function. This function
allows us to indicate that a condition is detected that the sched
domain of x86 needs a complete rebuild. This is done by setting the
x86_topology_update flag.
Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
---
arch/x86/include/asm/topology.h | 2 ++
arch/x86/kernel/smpboot.c | 11 +++++++++++
2 files changed, 13 insertions(+)
diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h
index 0bcf3b7..8d6df77 100644
--- a/arch/x86/include/asm/topology.h
+++ b/arch/x86/include/asm/topology.h
@@ -147,6 +147,8 @@ struct pci_bus;
int x86_pci_root_bus_node(int bus);
void x86_pci_root_bus_resources(int bus, struct list_head *resources);
+extern bool x86_topology_update;
+
#ifdef CONFIG_SCHED_ITMT
extern unsigned int __read_mostly sysctl_sched_itmt_enabled;
#endif /* CONFIG_SCHED_ITMT */
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 292df31..737b9edf 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -110,6 +110,17 @@ static bool logical_packages_frozen __read_mostly;
int __max_smt_threads __read_mostly;
unsigned int __read_mostly sysctl_sched_itmt_enabled;
+/* Flag to indicate if a complete sched domain rebuild is required */
+bool x86_topology_update;
+
+int arch_update_cpu_topology(void)
+{
+ if (x86_topology_update) {
+ x86_topology_update = false;
+ return 1;
+ } else
+ return 0;
+}
static inline void smpboot_setup_warm_reset_vector(unsigned long start_eip)
{
--
2.7.4
next prev parent reply other threads:[~2016-09-01 21:08 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-01 20:33 [PATCH v2 0/8] Support Intel® Turbo Boost Max Technology 3.0 Srinivas Pandruvada
2016-09-01 20:33 ` [PATCH v2 1/8] sched, x86: Add SD_ASYM_PACKING flags to x86 cpu topology for ITMT Srinivas Pandruvada
2016-09-01 20:33 ` [PATCH v2 2/8] sched: Extend scheduler's asym packing Srinivas Pandruvada
2016-09-08 8:01 ` Peter Zijlstra
2016-09-08 18:03 ` Tim Chen
2016-09-08 18:21 ` Peter Zijlstra
2016-09-01 20:33 ` [PATCH v2 3/8] x86, cpu: provide a function topology_num_packages to enumerate #packages Srinivas Pandruvada
2016-09-01 20:33 ` Srinivas Pandruvada [this message]
2016-09-01 20:33 ` [PATCH v2 5/8] sched,x86: Enable Turbo Boost Max Technology Srinivas Pandruvada
2016-09-08 7:59 ` Peter Zijlstra
2016-09-08 18:09 ` Tim Chen
2016-09-08 18:22 ` Peter Zijlstra
2016-09-08 18:28 ` Srinivas Pandruvada
2016-09-08 18:33 ` Peter Zijlstra
2016-09-08 18:41 ` Srinivas Pandruvada
2016-09-08 21:22 ` Rafael J. Wysocki
2016-09-01 20:33 ` [PATCH v2 6/8] acpi: bus: Enable HWP CPPC objects Srinivas Pandruvada
2016-09-01 23:15 ` kbuild test robot
2016-09-01 23:46 ` Srinivas Pandruvada
2016-09-01 20:33 ` [PATCH v2 7/8] acpi: bus: Set _OSC for diverse core support Srinivas Pandruvada
2016-09-01 20:33 ` [PATCH v2 8/8] cpufreq: intel_pstate: Use CPPC to get max performance Srinivas Pandruvada
2016-09-01 22:31 ` kbuild test robot
2016-09-08 8:02 ` [PATCH v2 0/8] Support Intel® Turbo Boost Max Technology 3.0 Peter Zijlstra
2016-09-15 12:14 ` Pavel Machek
2016-09-15 12:46 ` One Thousand Gnomes
2016-09-16 16:03 ` Tim Chen
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