diff options
Diffstat (limited to 'init/Kconfig')
| -rw-r--r-- | init/Kconfig | 63 |
1 files changed, 50 insertions, 13 deletions
diff --git a/init/Kconfig b/init/Kconfig index 7be4d3836745..c4b3c6d51a72 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -302,13 +302,14 @@ config AUDITSYSCALL config AUDIT_TREE def_bool y - depends on AUDITSYSCALL && INOTIFY + depends on AUDITSYSCALL + select INOTIFY menu "RCU Subsystem" choice prompt "RCU Implementation" - default CLASSIC_RCU + default TREE_RCU config CLASSIC_RCU bool "Classic RCU" @@ -615,13 +616,13 @@ config SYSFS_DEPRECATED bool config SYSFS_DEPRECATED_V2 - bool "Create deprecated sysfs layout for older userspace tools" + bool "remove sysfs features which may confuse old userspace tools" depends on SYSFS - default y + default n select SYSFS_DEPRECATED help This option switches the layout of sysfs to the deprecated - version. + version. Do not use it on recent distributions. The current sysfs layout features a unified device tree at /sys/devices/, which is able to express a hierarchy between @@ -808,14 +809,6 @@ config KALLSYMS_EXTRA_PASS you wait for kallsyms to be fixed. -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 HOTPLUG bool "Support for hot-pluggable devices" if EMBEDDED default y @@ -933,6 +926,42 @@ config AIO by some high performance threaded applications. Disabling this option saves about 7k. +config HAVE_PERF_COUNTERS + bool + help + See tools/perf/design.txt for details. + +menu "Performance Counters" + +config PERF_COUNTERS + bool "Kernel Performance Counters" + depends on HAVE_PERF_COUNTERS + select ANON_INODES + help + Enable kernel support for performance counter hardware. + + Performance counters are special hardware registers available + on most modern CPUs. 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 + provides per task and per CPU counters, and it provides event + capabilities on top of those. + + Say Y if unsure. + +config EVENT_PROFILE + bool "Tracepoint profile sources" + depends on PERF_COUNTERS && EVENT_TRACER + default y + +endmenu + config VM_EVENT_COUNTERS default y bool "Enable VM event counters for /proc/vmstat" if EMBEDDED @@ -961,6 +990,14 @@ 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 |