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 v4 12/13] x86/resctrl: Replace smp_call_function_many with on_each_cpu_mask
Date: Wed, 7 Sep 2022 13:01:23 -0500 [thread overview]
Message-ID: <166257368306.1043018.15116501631578530094.stgit@bmoger-ubuntu> (raw)
In-Reply-To: <166257348081.1043018.11227924488792315932.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 59b484eb1267..fa0e1e8e29aa 100644
--- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c
+++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
@@ -518,12 +518,7 @@ 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,
@@ -2058,13 +2053,9 @@ 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);
@@ -2506,7 +2497,7 @@ 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;
@@ -2527,13 +2518,9 @@ 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:[~2022-09-07 18:02 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-07 17:59 [PATCH v4 00/13] x86/resctrl: Support for AMD QoS new features and bug fix Babu Moger
2022-09-07 17:59 ` [PATCH v4 01/13] x86/resctrl: Fix min_cbm_bits for AMD Babu Moger
2022-09-09 17:00 ` James Morse
2022-09-12 14:54 ` Moger, Babu
2022-09-16 15:52 ` Reinette Chatre
2022-09-16 18:28 ` Moger, Babu
2022-09-16 15:53 ` Reinette Chatre
2022-09-16 18:31 ` Moger, Babu
2022-09-07 18:00 ` [PATCH v4 02/13] x86/resctrl: Remove arch_has_empty_bitmaps Babu Moger
2022-09-16 15:53 ` Reinette Chatre
2022-09-16 19:00 ` Moger, Babu
2022-09-07 18:00 ` [PATCH v4 03/13] x86/cpufeatures: Add Slow Memory Bandwidth Allocation feature flag Babu Moger
2022-09-16 15:54 ` Reinette Chatre
2022-09-16 19:02 ` Moger, Babu
2022-09-07 18:00 ` [PATCH v4 04/13] x86/resctrl: Add a new resource type RDT_RESOURCE_SMBA Babu Moger
2022-09-16 15:54 ` Reinette Chatre
2022-09-16 19:11 ` Moger, Babu
2022-09-07 18:00 ` [PATCH v4 05/13] x86/cpufeatures: Add Bandwidth Monitoring Event Configuration feature flag Babu Moger
2022-09-07 18:36 ` Daniel Sneddon
2022-09-07 19:59 ` Moger, Babu
2022-09-16 15:55 ` Reinette Chatre
2022-09-16 20:19 ` Moger, Babu
2022-09-07 18:00 ` [PATCH v4 06/13] x86/resctrl: Include new features in command line options Babu Moger
2022-09-16 15:55 ` Reinette Chatre
2022-09-16 20:22 ` Moger, Babu
2022-09-07 18:00 ` [PATCH v4 07/13] x86/resctrl: Detect and configure Slow Memory Bandwidth allocation Babu Moger
2022-09-07 18:00 ` [PATCH v4 08/13] x86/resctrl : Introduce data structure to support monitor configuration Babu Moger
2022-09-16 15:56 ` Reinette Chatre
2022-09-16 21:23 ` Moger, Babu
2022-09-07 18:01 ` [PATCH v4 09/13] x86/resctrl: Add sysfs interface files to read/write event configuration Babu Moger
2022-09-16 15:58 ` Reinette Chatre
2022-09-19 15:46 ` Moger, Babu
2022-09-19 16:42 ` Reinette Chatre
2022-09-19 20:26 ` Moger, Babu
2022-09-19 21:07 ` Reinette Chatre
2022-09-20 17:09 ` Moger, Babu
2022-09-07 18:01 ` [PATCH v4 10/13] x86/resctrl: Add the sysfs interface to read the " Babu Moger
2022-09-16 15:59 ` Reinette Chatre
2022-09-19 16:07 ` Moger, Babu
2022-09-07 18:01 ` [PATCH v4 11/13] x86/resctrl: Add sysfs interface to write " Babu Moger
2022-09-16 16:17 ` Reinette Chatre
2022-09-19 16:50 ` Moger, Babu
2022-09-07 18:01 ` Babu Moger [this message]
2022-09-16 16:17 ` [PATCH v4 12/13] x86/resctrl: Replace smp_call_function_many with on_each_cpu_mask Reinette Chatre
2022-09-16 20:38 ` Moger, Babu
2022-09-07 18:01 ` [PATCH v4 13/13] Documentation/x86: Update resctrl_ui.rst for new features Babu Moger
2022-09-08 4:07 ` Bagas Sanjaya
2022-09-08 9:26 ` Bagas Sanjaya
2022-09-08 13:40 ` Moger, Babu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=166257368306.1043018.15116501631578530094.stgit@bmoger-ubuntu \
--to=babu.moger@amd.com \
--cc=akpm@linux-foundation.org \
--cc=bagasdotme@gmail.com \
--cc=bp@alien8.de \
--cc=chang.seok.bae@intel.com \
--cc=corbet@lwn.net \
--cc=damien.lemoal@opensource.wdc.com \
--cc=daniel.sneddon@linux.intel.com \
--cc=dave.hansen@linux.intel.com \
--cc=eranian@google.com \
--cc=fenghua.yu@intel.com \
--cc=hpa@zytor.com \
--cc=james.morse@arm.com \
--cc=jmattson@google.com \
--cc=jpoimboe@kernel.org \
--cc=linux-doc@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=paulmck@kernel.org \
--cc=pawan.kumar.gupta@linux.intel.com \
--cc=pbonzini@redhat.com \
--cc=peterz@infradead.org \
--cc=quic_neeraju@quicinc.com \
--cc=rdunlap@infradead.org \
--cc=reinette.chatre@intel.com \
--cc=sandipan.das@amd.com \
--cc=songmuchun@bytedance.com \
--cc=tglx@linutronix.de \
--cc=tony.luck@intel.com \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).