diff options
Diffstat (limited to 'init/Kconfig')
-rw-r--r-- | init/Kconfig | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/init/Kconfig b/init/Kconfig index 223b734abccd..760b7d0bc9d7 100644 --- a/init/Kconfig +++ b/init/Kconfig | |||
@@ -875,17 +875,19 @@ config LOG_CPU_MAX_BUF_SHIFT | |||
875 | 13 => 8 KB for each CPU | 875 | 13 => 8 KB for each CPU |
876 | 12 => 4 KB for each CPU | 876 | 12 => 4 KB for each CPU |
877 | 877 | ||
878 | config NMI_LOG_BUF_SHIFT | 878 | config PRINTK_SAFE_LOG_BUF_SHIFT |
879 | int "Temporary per-CPU NMI log buffer size (12 => 4KB, 13 => 8KB)" | 879 | int "Temporary per-CPU printk log buffer size (12 => 4KB, 13 => 8KB)" |
880 | range 10 21 | 880 | range 10 21 |
881 | default 13 | 881 | default 13 |
882 | depends on PRINTK_NMI | 882 | depends on PRINTK |
883 | help | 883 | help |
884 | Select the size of a per-CPU buffer where NMI messages are temporary | 884 | Select the size of an alternate printk per-CPU buffer where messages |
885 | stored. They are copied to the main log buffer in a safe context | 885 | printed from usafe contexts are temporary stored. One example would |
886 | to avoid a deadlock. The value defines the size as a power of 2. | 886 | be NMI messages, another one - printk recursion. The messages are |
887 | copied to the main log buffer in a safe context to avoid a deadlock. | ||
888 | The value defines the size as a power of 2. | ||
887 | 889 | ||
888 | NMI messages are rare and limited. The largest one is when | 890 | Those messages are rare and limited. The largest one is when |
889 | a backtrace is printed. It usually fits into 4KB. Select | 891 | a backtrace is printed. It usually fits into 4KB. Select |
890 | 8KB if you want to be on the safe side. | 892 | 8KB if you want to be on the safe side. |
891 | 893 | ||