linux-kernel - [PATCH] mm: Add config option for default panic_on

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Date:   Wed, 11 May 2022 13:34:00 -0500
From:   Eddie James <eajames@...ux.ibm.com>
To:     linux-mm@...ck.org
Cc:     linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
        Eddie James <eajames@...ux.ibm.com>
Subject: [PATCH] mm: Add config option for default panic_on_oom value

Add the option to kconfig and set the default panic_on_value.

Signed-off-by: Eddie James <eajames@...ux.ibm.com>
---
 mm/Kconfig    | 7 +++++++
 mm/oom_kill.c | 2 +-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/mm/Kconfig b/mm/Kconfig
index 675a6be43739..1fde865b0a63 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -825,6 +825,13 @@ config ZSMALLOC_STAT
 config GENERIC_EARLY_IOREMAP
 	bool
 
+config PANIC_ON_OOM_DEFAULT
+	int "Startup setting for panic_on_oom"
+	default 0
+	range 0 2
+	help
+	  This is the default startup value for /proc/sys/vm/panic_on_oom
+
 config STACK_MAX_DEFAULT_SIZE_MB
 	int "Default maximum user stack size for 32-bit processes (MB)"
 	default 100
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 3996301450e8..a6a9cc5635f8 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -52,7 +52,7 @@
 #define CREATE_TRACE_POINTS
 #include <trace/events/oom.h>
 
-static int sysctl_panic_on_oom;
+static int sysctl_panic_on_oom = CONFIG_PANIC_ON_OOM_DEFAULT;
 static int sysctl_oom_kill_allocating_task;
 static int sysctl_oom_dump_tasks = 1;
 
-- 
2.27.0