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| author | travis@sgi.com <travis@sgi.com> | 2008-01-30 13:33:22 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:33:22 +0100 |
| commit | c49a4955ea504c82f6b690491639bba5b8c1dc47 (patch) | |
| tree | badef899e3e3376c1af68b942b7f6c8ff9a36df5 /arch/x86/Kconfig.debug | |
| parent | x86: change bios_cpu_apicid to percpu data variable fixup (diff) | |
| download | linux-c49a4955ea504c82f6b690491639bba5b8c1dc47.tar.xz linux-c49a4955ea504c82f6b690491639bba5b8c1dc47.zip | |
x86: add debug of invalid per_cpu map accesses
Provide a means to trap usages of per_cpu map variables before
they are setup. Define CONFIG_DEBUG_PER_CPU_MAPS to activate.
Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/Kconfig.debug')
| -rw-r--r-- | arch/x86/Kconfig.debug | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug index 88420af98140..0a82b889d76e 100644 --- a/arch/x86/Kconfig.debug +++ b/arch/x86/Kconfig.debug @@ -47,6 +47,18 @@ config DEBUG_PAGEALLOC This results in a large slowdown, but helps to find certain types of memory corruptions. +config DEBUG_PER_CPU_MAPS + bool "Debug access to per_cpu maps" + depends on DEBUG_KERNEL + depends on X86_64_SMP + default n + help + Say Y to verify that the per_cpu map being accessed has + been setup. Adds a fair amount of code to kernel memory + and decreases performance. + + Say N if unsure. + config DEBUG_RODATA bool "Write protect kernel read-only data structures" depends on DEBUG_KERNEL |