aboutsummaryrefslogtreecommitdiffstats
path: root/init/Kconfig
diff options
context:
space:
mode:
Diffstat (limited to 'init/Kconfig')
-rw-r--r--init/Kconfig16
1 files changed, 9 insertions, 7 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
861 13 => 8 KB for each CPU 861 13 => 8 KB for each CPU
862 12 => 4 KB for each CPU 862 12 => 4 KB for each CPU
863 863
864config NMI_LOG_BUF_SHIFT 864config PRINTK_SAFE_LOG_BUF_SHIFT
865 int "Temporary per-CPU NMI log buffer size (12 => 4KB, 13 => 8KB)" 865 int "Temporary per-CPU printk log buffer size (12 => 4KB, 13 => 8KB)"
866 range 10 21 866 range 10 21
867 default 13 867 default 13
868 depends on PRINTK_NMI 868 depends on PRINTK
869 help 869 help
870 Select the size of a per-CPU buffer where NMI messages are temporary 870 Select the size of an alternate printk per-CPU buffer where messages
871 stored. They are copied to the main log buffer in a safe context 871 printed from usafe contexts are temporary stored. One example would
872 to avoid a deadlock. The value defines the size as a power of 2. 872 be NMI messages, another one - printk recursion. The messages are
873 copied to the main log buffer in a safe context to avoid a deadlock.
874 The value defines the size as a power of 2.
873 875
874 NMI messages are rare and limited. The largest one is when 876 Those messages are rare and limited. The largest one is when
875 a backtrace is printed. It usually fits into 4KB. Select 877 a backtrace is printed. It usually fits into 4KB. Select
876 8KB if you want to be on the safe side. 878 8KB if you want to be on the safe side.
877 879