From: Alex Belits <abelits@marvell.com>
To: "nitesh@redhat.com" <nitesh@redhat.com>,
"frederic@kernel.org" <frederic@kernel.org>
Cc: Prasun Kapoor <pkapoor@marvell.com>,
"linux-api@vger.kernel.org" <linux-api@vger.kernel.org>,
"davem@davemloft.net" <davem@davemloft.net>,
"trix@redhat.com" <trix@redhat.com>,
"mingo@kernel.org" <mingo@kernel.org>,
"catalin.marinas@arm.com" <catalin.marinas@arm.com>,
"rostedt@goodmis.org" <rostedt@goodmis.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"peterx@redhat.com" <peterx@redhat.com>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"linux-arch@vger.kernel.org" <linux-arch@vger.kernel.org>,
"mtosatti@redhat.com" <mtosatti@redhat.com>,
"will@kernel.org" <will@kernel.org>,
"peterz@infradead.org" <peterz@infradead.org>,
"leon@sidebranch.com" <leon@sidebranch.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"pauld@redhat.com" <pauld@redhat.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>
Subject: [PATCH v5 9/9] task_isolation: kick_all_cpus_sync: don't kick isolated cpus
Date: Mon, 23 Nov 2020 17:58:42 +0000 [thread overview]
Message-ID: <3236b13f42679031960c5605be20664e90e75223.camel@marvell.com> (raw)
In-Reply-To: <8d887e59ca713726f4fcb25a316e1e932b02823e.camel@marvell.com>
From: Yuri Norov <ynorov@marvell.com>
Make sure that kick_all_cpus_sync() does not call CPUs that are running
isolated tasks.
Signed-off-by: Yuri Norov <ynorov@marvell.com>
[abelits@marvell.com: use safe task_isolation_cpumask() implementation]
Signed-off-by: Alex Belits <abelits@marvell.com>
---
kernel/smp.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/kernel/smp.c b/kernel/smp.c
index 4d17501433be..b2faecf58ed0 100644
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -932,9 +932,21 @@ static void do_nothing(void *unused)
*/
void kick_all_cpus_sync(void)
{
+ struct cpumask mask;
+
/* Make sure the change is visible before we kick the cpus */
smp_mb();
- smp_call_function(do_nothing, NULL, 1);
+
+ preempt_disable();
+#ifdef CONFIG_TASK_ISOLATION
+ cpumask_clear(&mask);
+ task_isolation_cpumask(&mask);
+ cpumask_complement(&mask, &mask);
+#else
+ cpumask_setall(&mask);
+#endif
+ smp_call_function_many(&mask, do_nothing, NULL, 1);
+ preempt_enable();
}
EXPORT_SYMBOL_GPL(kick_all_cpus_sync);
--
2.20.1
next prev parent reply other threads:[~2020-11-23 17:59 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-23 17:42 [PATCH v5 0/9] "Task_isolation" mode Alex Belits
2020-11-23 17:56 ` [PATCH v5 1/9] task_isolation: vmstat: add quiet_vmstat_sync function Alex Belits
2020-11-23 21:48 ` Thomas Gleixner
2020-11-23 17:56 ` [PATCH v5 2/9] task_isolation: vmstat: add vmstat_idle function Alex Belits
2020-11-23 21:49 ` Thomas Gleixner
2020-11-23 17:56 ` [PATCH v5 3/9] task_isolation: userspace hard isolation from kernel Alex Belits
2020-11-23 22:01 ` Thomas Gleixner
2020-11-23 17:57 ` [PATCH v5 4/9] task_isolation: Add task isolation hooks to arch-independent code Alex Belits
2020-11-23 22:31 ` Thomas Gleixner
2020-11-23 17:57 ` [PATCH v5 5/9] task_isolation: Add driver-specific hooks Alex Belits
2020-12-02 14:18 ` Mark Rutland
2020-12-04 0:43 ` [EXT] " Alex Belits
2020-11-23 17:58 ` [PATCH v5 6/9] task_isolation: arch/arm64: enable task isolation functionality Alex Belits
2020-12-02 13:59 ` Mark Rutland
2020-12-04 0:37 ` [EXT] " Alex Belits
2020-12-07 11:57 ` Mark Rutland
2020-11-23 17:58 ` [PATCH v5 7/9] task_isolation: don't interrupt CPUs with tick_nohz_full_kick_cpu() Alex Belits
2020-11-23 22:13 ` Frederic Weisbecker
2020-11-23 22:35 ` Alex Belits
2020-11-23 22:36 ` Thomas Gleixner
2020-12-02 14:20 ` Mark Rutland
2020-12-04 0:54 ` [EXT] " Alex Belits
2020-12-07 11:58 ` Mark Rutland
2020-11-23 17:58 ` [PATCH v5 8/9] task_isolation: ringbuffer: don't interrupt CPUs running isolated tasks on buffer resize Alex Belits
2020-11-23 17:58 ` Alex Belits [this message]
2020-11-23 22:29 ` [PATCH v5 9/9] task_isolation: kick_all_cpus_sync: don't kick isolated cpus Frederic Weisbecker
2020-11-23 22:39 ` [EXT] " Alex Belits
2020-11-23 23:21 ` Frederic Weisbecker
2020-11-25 3:20 ` Alex Belits
2021-01-22 15:00 ` Marcelo Tosatti
2020-11-24 16:36 ` [PATCH v5 0/9] "Task_isolation" mode Tom Rix
2020-11-24 17:40 ` [EXT] " Alex Belits
2020-12-02 14:02 ` Mark Rutland
2020-12-04 0:39 ` Alex Belits
2020-12-05 20:40 ` Pavel Machek
2020-12-05 23:25 ` Thomas Gleixner
2020-12-11 18:08 ` Yury Norov
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