diff options
author | Ingo Molnar <mingo@elte.hu> | 2008-11-03 02:57:41 -0500 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2008-11-03 02:57:41 -0500 |
commit | db5935001a43528e673ad26ffec9d98c60a496a9 (patch) | |
tree | 8e735327a97beccabb5d94ef93df25d2bacda705 /arch/x86/Kconfig.cpu | |
parent | 34f3a814eef8069a24e5b3ebcf27aba9dabac2ea (diff) | |
parent | 45beca08dd8b6d6a65c5ffd730af2eac7a2c7a03 (diff) |
Merge commit 'v2.6.28-rc3' into sched/core
Diffstat (limited to 'arch/x86/Kconfig.cpu')
-rw-r--r-- | arch/x86/Kconfig.cpu | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu index 0b7c4a3f0651..b815664fe370 100644 --- a/arch/x86/Kconfig.cpu +++ b/arch/x86/Kconfig.cpu | |||
@@ -513,19 +513,19 @@ config CPU_SUP_UMC_32 | |||
513 | If unsure, say N. | 513 | If unsure, say N. |
514 | 514 | ||
515 | config X86_DS | 515 | config X86_DS |
516 | bool "Debug Store support" | 516 | def_bool X86_PTRACE_BTS |
517 | default y | 517 | depends on X86_DEBUGCTLMSR |
518 | help | ||
519 | Add support for Debug Store. | ||
520 | This allows the kernel to provide a memory buffer to the hardware | ||
521 | to store various profiling and tracing events. | ||
522 | 518 | ||
523 | config X86_PTRACE_BTS | 519 | config X86_PTRACE_BTS |
524 | bool "ptrace interface to Branch Trace Store" | 520 | bool "Branch Trace Store" |
525 | default y | 521 | default y |
526 | depends on (X86_DS && X86_DEBUGCTLMSR) | 522 | depends on X86_DEBUGCTLMSR |
527 | help | 523 | help |
528 | Add a ptrace interface to allow collecting an execution trace | 524 | This adds a ptrace interface to the hardware's branch trace store. |
529 | of the traced task. | 525 | |
530 | This collects control flow changes in a (cyclic) buffer and allows | 526 | Debuggers may use it to collect an execution trace of the debugged |
531 | debuggers to fill in the gaps and show an execution trace of the debuggee. | 527 | application in order to answer the question 'how did I get here?'. |
528 | Debuggers may trace user mode as well as kernel mode. | ||
529 | |||
530 | Say Y unless there is no application development on this machine | ||
531 | and you want to save a small amount of code size. | ||