linux-kernel - [RFC][PATCH 13/14] sched: add sched_kmemdump

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Message-ID: <20250422113156.575971-14-eugen.hristev@linaro.org>
Date: Tue, 22 Apr 2025 14:31:55 +0300
From: Eugen Hristev <eugen.hristev@...aro.org>
To: linux-kernel@...r.kernel.org,
	linux-arm-msm@...r.kernel.org,
	andersson@...nel.org
Cc: linux-doc@...r.kernel.org,
	corbet@....net,
	tglx@...utronix.de,
	mingo@...hat.com,
	rostedt@...dmis.org,
	john.ogness@...utronix.de,
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	pmladek@...e.com,
	peterz@...radead.org,
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	linux-arm-kernel@...ts.infradead.org,
	vincent.guittot@...aro.org,
	konradybcio@...nel.org,
	dietmar.eggemann@....com,
	juri.lelli@...hat.com,
	eugen.hristev@...aro.org
Subject: [RFC][PATCH 13/14] sched: add sched_kmemdump_register

Add function to register scheduler info into kmemdump

Signed-off-by: Eugen Hristev <eugen.hristev@...aro.org>
---
 include/linux/sched.h | 1 +
 kernel/sched/core.c   | 7 +++++++
 2 files changed, 8 insertions(+)

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 9c15365a30c0..441f5a6099f6 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1820,6 +1820,7 @@ extern int cpuset_cpumask_can_shrink(const struct cpumask *cur, const struct cpu
 extern int task_can_attach(struct task_struct *p);
 extern int dl_bw_alloc(int cpu, u64 dl_bw);
 extern void dl_bw_free(int cpu, u64 dl_bw);
+extern void sched_kmemdump_register(void);
 #ifdef CONFIG_SMP
 
 /* do_set_cpus_allowed() - consider using set_cpus_allowed_ptr() instead */
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 00ea6f31973c..8615fd02d4db 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -66,6 +66,7 @@
 #include <linux/vtime.h>
 #include <linux/wait_api.h>
 #include <linux/workqueue_api.h>
+#include <linux/kmemdump.h>
 
 #ifdef CONFIG_PREEMPT_DYNAMIC
 # ifdef CONFIG_GENERIC_ENTRY
@@ -8672,6 +8673,12 @@ void __init sched_init(void)
 	scheduler_running = 1;
 }
 
+void sched_kmemdump_register(void)
+{
+	kmemdump_register("runqueues", (void *)&runqueues, sizeof(runqueues));
+}
+EXPORT_SYMBOL_GPL(sched_kmemdump_register);
+
 #ifdef CONFIG_DEBUG_ATOMIC_SLEEP
 
 void __might_sleep(const char *file, int line)
-- 
2.43.0