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-rw-r--r--init/Kconfig16
-rw-r--r--init/main.c2
2 files changed, 10 insertions, 8 deletions
diff --git a/init/Kconfig b/init/Kconfig
index 55bb6fbc294e..483ad679aa37 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -861,17 +861,19 @@ config LOG_CPU_MAX_BUF_SHIFT
13 => 8 KB for each CPU
12 => 4 KB for each CPU
-config NMI_LOG_BUF_SHIFT
- int "Temporary per-CPU NMI log buffer size (12 => 4KB, 13 => 8KB)"
+config PRINTK_SAFE_LOG_BUF_SHIFT
+ int "Temporary per-CPU printk log buffer size (12 => 4KB, 13 => 8KB)"
range 10 21
default 13
- depends on PRINTK_NMI
+ depends on PRINTK
help
- Select the size of a per-CPU buffer where NMI messages are temporary
- stored. They are copied to the main log buffer in a safe context
- to avoid a deadlock. The value defines the size as a power of 2.
+ Select the size of an alternate printk per-CPU buffer where messages
+ printed from usafe contexts are temporary stored. One example would
+ be NMI messages, another one - printk recursion. The messages are
+ copied to the main log buffer in a safe context to avoid a deadlock.
+ The value defines the size as a power of 2.
- NMI messages are rare and limited. The largest one is when
+ Those messages are rare and limited. The largest one is when
a backtrace is printed. It usually fits into 4KB. Select
8KB if you want to be on the safe side.
diff --git a/init/main.c b/init/main.c
index c8a00f0f10ff..24ea48745061 100644
--- a/init/main.c
+++ b/init/main.c
@@ -581,7 +581,7 @@ asmlinkage __visible void __init start_kernel(void)
timekeeping_init();
time_init();
sched_clock_postinit();
- printk_nmi_init();
+ printk_safe_init();
perf_event_init();
profile_init();
call_function_init();