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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org
Cc: Dmitry Vyukov <dvyukov@google.com>,
	Andrey Konovalov <andreyknvl@gmail.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Steven Rostedt <rostedt@goodmis.org>,
	Marco Elver <elver@google.com>,
	Clark Williams <williams@redhat.com>,
	Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Subject: [PATCH 3/5] kcov: Allocate per-CPU memory on the relevant node.
Date: Mon, 30 Aug 2021 19:26:25 +0200	[thread overview]
Message-ID: <20210830172627.267989-4-bigeasy@linutronix.de> (raw)
In-Reply-To: <20210830172627.267989-1-bigeasy@linutronix.de>

During boot kcov allocates per-CPU memory which is used later if remote/
softirq processing is enabled.

Allocate the per-CPU memory on the CPU local node to avoid cross node
memory access.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
 kernel/kcov.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/kcov.c b/kernel/kcov.c
index 80bfe71bbe13e..4f910231d99a2 100644
--- a/kernel/kcov.c
+++ b/kernel/kcov.c
@@ -1034,8 +1034,8 @@ static int __init kcov_init(void)
 	int cpu;
 
 	for_each_possible_cpu(cpu) {
-		void *area = vmalloc(CONFIG_KCOV_IRQ_AREA_SIZE *
-				sizeof(unsigned long));
+		void *area = vmalloc_node(CONFIG_KCOV_IRQ_AREA_SIZE *
+				sizeof(unsigned long), cpu_to_node(cpu));
 		if (!area)
 			return -ENOMEM;
 		per_cpu_ptr(&kcov_percpu_data, cpu)->irq_area = area;
-- 
2.33.0


  parent reply	other threads:[~2021-08-30 17:26 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-30 17:26 [PATCH 0/5] kcov: PREEMPT_RT fixup + misc Sebastian Andrzej Siewior
2021-08-30 17:26 ` [PATCH 1/5] Documentation/kcov: Include types.h in the example Sebastian Andrzej Siewior
2021-09-17 14:34   ` Dmitry Vyukov
2021-08-30 17:26 ` [PATCH 2/5] Documentation/kcov: Define `ip' " Sebastian Andrzej Siewior
2021-09-17 14:37   ` Dmitry Vyukov
2021-08-30 17:26 ` Sebastian Andrzej Siewior [this message]
2021-09-17 14:38   ` [PATCH 3/5] kcov: Allocate per-CPU memory on the relevant node Dmitry Vyukov
2021-08-30 17:26 ` [PATCH 4/5] kcov: Avoid enable+disable interrupts if !in_task() Sebastian Andrzej Siewior
2021-09-17 14:50   ` Dmitry Vyukov
2021-08-30 17:26 ` [PATCH 5/5] kcov: Replace local_irq_save() with a local_lock_t Sebastian Andrzej Siewior
2021-09-17 14:58   ` Dmitry Vyukov
2021-09-06 16:13 ` [PATCH 0/5] kcov: PREEMPT_RT fixup + misc Marco Elver
2021-09-06 16:28   ` Sebastian Andrzej Siewior
2021-09-20  9:26     ` Marco Elver
2021-09-20  9:50       ` Sebastian Andrzej Siewior

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