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-rw-r--r--init/Kconfig86
1 files changed, 62 insertions, 24 deletions
diff --git a/init/Kconfig b/init/Kconfig
index 0121c0ea3e0..2e9a1457132 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -297,7 +297,7 @@ config AUDIT
config AUDITSYSCALL
bool "Enable system-call auditing support"
- depends on AUDIT && (X86 || PPC || PPC64 || S390 || IA64 || UML || SPARC64|| SUPERH)
+ depends on AUDIT && (X86 || PPC || S390 || IA64 || UML || SPARC64 || SUPERH)
default y if SECURITY_SELINUX
help
Enable low-overhead system-call auditing infrastructure that
@@ -606,7 +606,7 @@ config SYSFS_DEPRECATED
bool
config SYSFS_DEPRECATED_V2
- bool "remove sysfs features which may confuse old userspace tools"
+ bool "enable deprecated sysfs features which may confuse old userspace tools"
depends on SYSFS
default n
select SYSFS_DEPRECATED
@@ -916,31 +916,41 @@ config AIO
by some high performance threaded applications. Disabling
this option saves about 7k.
-config HAVE_PERF_COUNTERS
+config HAVE_PERF_EVENTS
bool
help
See tools/perf/design.txt for details.
-menu "Performance Counters"
+config PERF_USE_VMALLOC
+ bool
+ help
+ See tools/perf/design.txt for details
-config PERF_COUNTERS
- bool "Kernel Performance Counters"
- default y if PROFILING
- depends on HAVE_PERF_COUNTERS
+menu "Kernel Performance Events And Counters"
+
+config PERF_EVENTS
+ bool "Kernel performance events and counters"
+ default y if (PROFILING || PERF_COUNTERS)
+ depends on HAVE_PERF_EVENTS
select ANON_INODES
help
- Enable kernel support for performance counter hardware.
+ Enable kernel support for various performance events provided
+ by software and hardware.
+
+ Software events are supported either built-in or via the
+ use of generic tracepoints.
- Performance counters are special hardware registers available
- on most modern CPUs. These registers count the number of certain
+ Most modern CPUs support performance events via performance
+ counter registers. These registers count the number of certain
types of hw events: such as instructions executed, cachemisses
suffered, or branches mis-predicted - without slowing down the
kernel or applications. These registers can also trigger interrupts
when a threshold number of events have passed - and can thus be
used to profile the code that runs on that CPU.
- The Linux Performance Counter subsystem provides an abstraction of
- these hardware capabilities, available via a system call. It
+ The Linux Performance Event subsystem provides an abstraction of
+ these software and hardware event capabilities, available via a
+ system call and used by the "perf" utility in tools/perf/. It
provides per task and per CPU counters, and it provides event
capabilities on top of those.
@@ -948,17 +958,42 @@ config PERF_COUNTERS
config EVENT_PROFILE
bool "Tracepoint profiling sources"
- depends on PERF_COUNTERS && EVENT_TRACING
+ depends on PERF_EVENTS && EVENT_TRACING
default y
help
- Allow the use of tracepoints as software performance counters.
+ Allow the use of tracepoints as software performance events.
- When this is enabled, you can create perf counters based on
+ When this is enabled, you can create perf events based on
tracepoints using PERF_TYPE_TRACEPOINT and the tracepoint ID
found in debugfs://tracing/events/*/*/id. (The -e/--events
option to the perf tool can parse and interpret symbolic
tracepoints, in the subsystem:tracepoint_name format.)
+config PERF_COUNTERS
+ bool "Kernel performance counters (old config option)"
+ depends on HAVE_PERF_EVENTS
+ help
+ This config has been obsoleted by the PERF_EVENTS
+ config option - please see that one for details.
+
+ It has no effect on the kernel whether you enable
+ it or not, it is a compatibility placeholder.
+
+ Say N if unsure.
+
+config DEBUG_PERF_USE_VMALLOC
+ default n
+ bool "Debug: use vmalloc to back perf mmap() buffers"
+ depends on PERF_EVENTS && DEBUG_KERNEL
+ select PERF_USE_VMALLOC
+ help
+ Use vmalloc memory to back perf mmap() buffers.
+
+ Mostly useful for debugging the vmalloc code on platforms
+ that don't require it.
+
+ Say N if unsure.
+
endmenu
config VM_EVENT_COUNTERS
@@ -989,14 +1024,6 @@ config SLUB_DEBUG
SLUB sysfs support. /sys/slab will not exist and there will be
no support for cache validation etc.
-config STRIP_ASM_SYMS
- bool "Strip assembler-generated symbols during link"
- default n
- help
- Strip internal assembler-generated symbols during a link (symbols
- that look like '.Lxxx') so they don't pollute the output of
- get_wchan() and suchlike.
-
config COMPAT_BRK
bool "Disable heap randomization"
default y
@@ -1071,6 +1098,16 @@ config SLOW_WORK
See Documentation/slow-work.txt.
+config SLOW_WORK_DEBUG
+ bool "Slow work debugging through debugfs"
+ default n
+ depends on SLOW_WORK && DEBUG_FS
+ help
+ Display the contents of the slow work run queue through debugfs,
+ including items currently executing.
+
+ See Documentation/slow-work.txt.
+
endmenu # General setup
config HAVE_GENERIC_DMA_COHERENT
@@ -1183,3 +1220,4 @@ source "block/Kconfig"
config PREEMPT_NOTIFIERS
bool
+source "kernel/Kconfig.locks"