From: Babu Moger <babu.moger@amd.com>
To: <corbet@lwn.net>, <reinette.chatre@intel.com>,
<tglx@linutronix.de>, <mingo@redhat.com>, <bp@alien8.de>
Cc: <fenghua.yu@intel.com>, <dave.hansen@linux.intel.com>,
<x86@kernel.org>, <hpa@zytor.com>, <paulmck@kernel.org>,
<akpm@linux-foundation.org>, <quic_neeraju@quicinc.com>,
<rdunlap@infradead.org>, <damien.lemoal@opensource.wdc.com>,
<songmuchun@bytedance.com>, <peterz@infradead.org>,
<jpoimboe@kernel.org>, <pbonzini@redhat.com>,
<babu.moger@amd.com>, <chang.seok.bae@intel.com>,
<pawan.kumar.gupta@linux.intel.com>, <jmattson@google.com>,
<daniel.sneddon@linux.intel.com>, <sandipan.das@amd.com>,
<tony.luck@intel.com>, <james.morse@arm.com>,
<linux-doc@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<bagasdotme@gmail.com>, <eranian@google.com>
Subject: [PATCH v7 11/12] x86/resctrl: Replace smp_call_function_many() with on_each_cpu_mask()
Date: Mon, 17 Oct 2022 17:27:27 -0500 [thread overview]
Message-ID: <166604564729.5345.14834531439162556392.stgit@bmoger-ubuntu> (raw)
In-Reply-To: <166604543832.5345.9696970469830919982.stgit@bmoger-ubuntu>
The call on_each_cpu_mask() can run the function on each CPU specified
by cpumask, which may include the local processor. So, replace the call
smp_call_function_many() with on_each_cpu_mask() to simplify the code.
Signed-off-by: Babu Moger <babu.moger@amd.com>
---
arch/x86/kernel/cpu/resctrl/rdtgroup.c | 29 ++++++++---------------------
1 file changed, 8 insertions(+), 21 deletions(-)
diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
index e744db5dc057..4f8a1c9c3e7a 100644
--- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c
+++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
@@ -325,12 +325,7 @@ static void update_cpu_closid_rmid(void *info)
static void
update_closid_rmid(const struct cpumask *cpu_mask, struct rdtgroup *r)
{
- int cpu = get_cpu();
-
- if (cpumask_test_cpu(cpu, cpu_mask))
- update_cpu_closid_rmid(r);
- smp_call_function_many(cpu_mask, update_cpu_closid_rmid, r, 1);
- put_cpu();
+ on_each_cpu_mask(cpu_mask, update_cpu_closid_rmid, r, 1);
}
static int cpus_mon_write(struct rdtgroup *rdtgrp, cpumask_var_t newmask,
@@ -2131,13 +2126,9 @@ static int set_cache_qos_cfg(int level, bool enable)
/* Pick one CPU from each domain instance to update MSR */
cpumask_set_cpu(cpumask_any(&d->cpu_mask), cpu_mask);
}
- cpu = get_cpu();
- /* Update QOS_CFG MSR on this cpu if it's in cpu_mask. */
- if (cpumask_test_cpu(cpu, cpu_mask))
- update(&enable);
- /* Update QOS_CFG MSR on all other cpus in cpu_mask. */
- smp_call_function_many(cpu_mask, update, &enable, 1);
- put_cpu();
+
+ /* Update QOS_CFG MSR on all the CPUs in cpu_mask */
+ on_each_cpu_mask(cpu_mask, update, &enable, 1);
free_cpumask_var(cpu_mask);
@@ -2614,7 +2605,7 @@ static int reset_all_ctrls(struct rdt_resource *r)
struct msr_param msr_param;
cpumask_var_t cpu_mask;
struct rdt_domain *d;
- int i, cpu;
+ int i;
if (!zalloc_cpumask_var(&cpu_mask, GFP_KERNEL))
return -ENOMEM;
@@ -2635,13 +2626,9 @@ static int reset_all_ctrls(struct rdt_resource *r)
for (i = 0; i < hw_res->num_closid; i++)
hw_dom->ctrl_val[i] = r->default_ctrl;
}
- cpu = get_cpu();
- /* Update CBM on this cpu if it's in cpu_mask. */
- if (cpumask_test_cpu(cpu, cpu_mask))
- rdt_ctrl_update(&msr_param);
- /* Update CBM on all other cpus in cpu_mask. */
- smp_call_function_many(cpu_mask, rdt_ctrl_update, &msr_param, 1);
- put_cpu();
+
+ /* Update CBM on all the CPUs in cpu_mask */
+ on_each_cpu_mask(cpu_mask, rdt_ctrl_update, &msr_param, 1);
free_cpumask_var(cpu_mask);
next prev parent reply other threads:[~2022-10-17 22:29 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-17 22:25 [PATCH v7 00/12] x86/resctrl: Support for AMD QoS new features Babu Moger
2022-10-17 22:26 ` [PATCH v7 01/12] x86/cpufeatures: Add Slow Memory Bandwidth Allocation feature flag Babu Moger
2022-10-27 18:49 ` Reinette Chatre
2022-10-27 19:17 ` Moger, Babu
2022-10-17 22:26 ` [PATCH v7 02/12] x86/resctrl: Add a new resource type RDT_RESOURCE_SMBA Babu Moger
2022-10-17 22:26 ` [PATCH v7 03/12] x86/cpufeatures: Add Bandwidth Monitoring Event Configuration feature flag Babu Moger
2022-10-17 22:26 ` [PATCH v7 04/12] x86/resctrl: Include new features in command line options Babu Moger
2022-10-17 22:26 ` [PATCH v7 05/12] x86/resctrl: Detect and configure Slow Memory Bandwidth allocation Babu Moger
2022-10-25 23:43 ` Reinette Chatre
2022-10-26 19:07 ` Moger, Babu
2022-10-26 20:23 ` Reinette Chatre
2022-10-27 15:30 ` Moger, Babu
2022-10-27 18:37 ` Reinette Chatre
2022-10-28 15:16 ` Moger, Babu
2022-10-17 22:26 ` [PATCH v7 06/12] x86/resctrl: Introduce data structure to support monitor configuration Babu Moger
2022-10-25 23:45 ` Reinette Chatre
2022-10-26 19:25 ` Moger, Babu
2022-10-17 22:26 ` [PATCH v7 07/12] x86/resctrl: Add sysfs interface to read mbm_total_bytes event configuration Babu Moger
2022-10-25 23:47 ` Reinette Chatre
2022-10-26 19:36 ` Moger, Babu
2022-10-17 22:27 ` [PATCH v7 08/12] x86/resctrl: Add sysfs interface to read mbm_local_bytes " Babu Moger
2022-10-17 22:27 ` [PATCH v7 09/12] x86/resctrl: Add sysfs interface to write mbm_total_bytes " Babu Moger
2022-10-25 23:48 ` Reinette Chatre
2022-10-26 19:52 ` Moger, Babu
2022-10-17 22:27 ` [PATCH v7 10/12] x86/resctrl: Add sysfs interface to write mbm_local_bytes " Babu Moger
2022-10-17 22:27 ` Babu Moger [this message]
2022-10-17 22:27 ` [PATCH v7 12/12] Documentation/x86: Update resctrl.rst for new features Babu Moger
2022-10-18 3:24 ` Bagas Sanjaya
2022-10-25 23:50 ` Reinette Chatre
2022-10-26 20:00 ` Moger, Babu
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