diff options
author | Paul Mundt <lethal@linux-sh.org> | 2008-10-31 16:18:02 +0900 |
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committer | Paul Mundt <lethal@linux-sh.org> | 2008-10-31 16:18:02 +0900 |
commit | 0803d540db06f53acd2fabf1347d5b665218f14a (patch) | |
tree | f5f8e5510a76bb59d3583478961daf5afc32df08 /arch/x86/Kconfig.cpu | |
parent | a8884e3415c29c58a5875d54c109c4a7fcaa6fb4 (diff) | |
parent | 721d5dfe7e516954c501d5e9d0dfab379cf4241a (diff) |
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
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 0b7c4a3f065..b815664fe37 100644 --- a/arch/x86/Kconfig.cpu +++ b/arch/x86/Kconfig.cpu @@ -513,19 +513,19 @@ config CPU_SUP_UMC_32 If unsure, say N. config X86_DS - bool "Debug Store support" - default y - help - Add support for Debug Store. - This allows the kernel to provide a memory buffer to the hardware - to store various profiling and tracing events. + def_bool X86_PTRACE_BTS + depends on X86_DEBUGCTLMSR config X86_PTRACE_BTS - bool "ptrace interface to Branch Trace Store" + bool "Branch Trace Store" default y - depends on (X86_DS && X86_DEBUGCTLMSR) + depends on X86_DEBUGCTLMSR help - Add a ptrace interface to allow collecting an execution trace - of the traced task. - This collects control flow changes in a (cyclic) buffer and allows - debuggers to fill in the gaps and show an execution trace of the debuggee. + This adds a ptrace interface to the hardware's branch trace store. + + Debuggers may use it to collect an execution trace of the debugged + application in order to answer the question 'how did I get here?'. + Debuggers may trace user mode as well as kernel mode. + + Say Y unless there is no application development on this machine + and you want to save a small amount of code size. |