The patch titled
Subject: kcov: allocate per-CPU memory on the relevant node
has been added to the -mm tree. Its filename is
kcov-allocate-per-cpu-memory-on-the-relevant-node.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/kcov-allocate-per-cpu-memory-on-the-relevant-node.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/kcov-allocate-per-cpu-memory-on-the-relevant-node.patch
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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
Subject: kcov: allocate per-CPU memory on the relevant node
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.
Link: https://lkml.kernel.org/r/20210923164741.1859522-4-bigeasy@xxxxxxxxxxxxx
Link: https://lore.kernel.org/r/20210830172627.267989-4-bigeasy@xxxxxxxxxxxxx
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
Acked-by: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Acked-by: Marco Elver <elver@xxxxxxxxxx>
Tested-by: Marco Elver <elver@xxxxxxxxxx>
Cc: Andrey Konovalov <andreyknvl@xxxxxxxxx>
Cc: Clark Williams <williams@xxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/kcov.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/kernel/kcov.c~kcov-allocate-per-cpu-memory-on-the-relevant-node
+++ a/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;
_
Patches currently in -mm which might be from bigeasy@xxxxxxxxxxxxx are
mm-disable-zsmalloc-on-preempt_rt.patch
documentation-kcov-include-typesh-in-the-example.patch
documentation-kcov-define-ip-in-the-example.patch
kcov-allocate-per-cpu-memory-on-the-relevant-node.patch
kcov-avoid-enabledisable-interrupts-if-in_task.patch
kcov-replace-local_irq_save-with-a-local_lock_t.patch
