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>,
Andrew Morton <akpm@linux-foundation.org>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Subject: [PATCH v2 3/5] kcov: Allocate per-CPU memory on the relevant node.
Date: Thu, 23 Sep 2021 18:47:39 +0200 [thread overview]
Message-ID: <20210923164741.1859522-4-bigeasy@linutronix.de> (raw)
In-Reply-To: <20210923164741.1859522-1-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>
Acked-by: Dmitry Vyukov <dvyukov@google.com>
Acked-by: Marco Elver <elver@google.com>
Tested-by: Marco Elver <elver@google.com>
Link: https://lore.kernel.org/r/20210830172627.267989-4-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
next prev parent reply other threads:[~2021-09-23 16:48 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-23 16:47 [PATCH v2 0/5] kcov: PREEMPT_RT fixup + misc Sebastian Andrzej Siewior
2021-09-23 16:47 ` [PATCH v2 1/5] Documentation/kcov: Include types.h in the example Sebastian Andrzej Siewior
2021-09-23 16:47 ` [PATCH v2 2/5] Documentation/kcov: Define `ip' " Sebastian Andrzej Siewior
2021-09-23 16:47 ` Sebastian Andrzej Siewior [this message]
2021-09-23 16:47 ` [PATCH v2 4/5] kcov: Avoid enable+disable interrupts if !in_task() Sebastian Andrzej Siewior
2021-09-23 16:47 ` [PATCH v2 5/5] kcov: Replace local_irq_save() with a local_lock_t Sebastian Andrzej Siewior
2021-10-03 18:11 ` [PATCH v2 0/5] kcov: PREEMPT_RT fixup + misc Andrey Konovalov
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