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-rw-r--r--lib/Kconfig.debug37
1 files changed, 28 insertions, 9 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 935248bdbc4..23120894836 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -512,6 +512,18 @@ config PROVE_RCU
Say N if you are unsure.
+config PROVE_RCU_REPEATEDLY
+ bool "RCU debugging: don't disable PROVE_RCU on first splat"
+ depends on PROVE_RCU
+ default n
+ help
+ By itself, PROVE_RCU will disable checking upon issuing the
+ first warning (or "splat"). This feature prevents such
+ disabling, allowing multiple RCU-lockdep warnings to be printed
+ on a single reboot.
+
+ Say N if you are unsure.
+
config LOCKDEP
bool
depends on DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT
@@ -793,7 +805,7 @@ config RCU_CPU_STALL_DETECTOR
config RCU_CPU_STALL_VERBOSE
bool "Print additional per-task information for RCU_CPU_STALL_DETECTOR"
depends on RCU_CPU_STALL_DETECTOR && TREE_PREEMPT_RCU
- default n
+ default y
help
This option causes RCU to printk detailed per-task information
for any tasks that are stalling the current RCU grace period.
@@ -1027,10 +1039,10 @@ config DYNAMIC_DEBUG
Usage:
- Dynamic debugging is controlled via the 'dynamic_debug/ddebug' file,
+ Dynamic debugging is controlled via the 'dynamic_debug/control' file,
which is contained in the 'debugfs' filesystem. Thus, the debugfs
filesystem must first be mounted before making use of this feature.
- We refer the control file as: <debugfs>/dynamic_debug/ddebug. This
+ We refer the control file as: <debugfs>/dynamic_debug/control. This
file contains a list of the debug statements that can be enabled. The
format for each line of the file is:
@@ -1045,7 +1057,7 @@ config DYNAMIC_DEBUG
From a live system:
- nullarbor:~ # cat <debugfs>/dynamic_debug/ddebug
+ nullarbor:~ # cat <debugfs>/dynamic_debug/control
# filename:lineno [module]function flags format
fs/aio.c:222 [aio]__put_ioctx - "__put_ioctx:\040freeing\040%p\012"
fs/aio.c:248 [aio]ioctx_alloc - "ENOMEM:\040nr_events\040too\040high\012"
@@ -1055,23 +1067,23 @@ config DYNAMIC_DEBUG
// enable the message at line 1603 of file svcsock.c
nullarbor:~ # echo -n 'file svcsock.c line 1603 +p' >
- <debugfs>/dynamic_debug/ddebug
+ <debugfs>/dynamic_debug/control
// enable all the messages in file svcsock.c
nullarbor:~ # echo -n 'file svcsock.c +p' >
- <debugfs>/dynamic_debug/ddebug
+ <debugfs>/dynamic_debug/control
// enable all the messages in the NFS server module
nullarbor:~ # echo -n 'module nfsd +p' >
- <debugfs>/dynamic_debug/ddebug
+ <debugfs>/dynamic_debug/control
// enable all 12 messages in the function svc_process()
nullarbor:~ # echo -n 'func svc_process +p' >
- <debugfs>/dynamic_debug/ddebug
+ <debugfs>/dynamic_debug/control
// disable all 12 messages in the function svc_process()
nullarbor:~ # echo -n 'func svc_process -p' >
- <debugfs>/dynamic_debug/ddebug
+ <debugfs>/dynamic_debug/control
See Documentation/dynamic-debug-howto.txt for additional information.
@@ -1086,6 +1098,13 @@ config DMA_API_DEBUG
This option causes a performance degredation. Use only if you want
to debug device drivers. If unsure, say N.
+config ATOMIC64_SELFTEST
+ bool "Perform an atomic64_t self-test at boot"
+ help
+ Enable this option to test the atomic64_t functions at boot.
+
+ If unsure, say N.
+
source "samples/Kconfig"
source "lib/Kconfig.kgdb"