avr/qmk/firmware - [no description]

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menu "Kernel hacking" source "lib/Kconfig.debug" # X86 config EARLY_PRINTK bool "Early printk" if EMBEDDED && DEBUG_KERNEL default y depends on X86 help Write kernel log output directly into the VGA buffer or to a serial port. This is useful for kernel debugging when your machine crashes very early before the console code is initialized. For normal operation it is not recommended because it looks ugly and doesn't cooperate with klogd/syslogd or the X server. You should normally N here, unless you want to debug such a crash. config DEBUG_STACKOVERFLOW bool "Check for stack overflows" depends on DEBUG_KERNEL && X86 config KPROBES bool "Kprobes" depends on DEBUG_KERNEL && X86 help Kprobes allows you to trap at almost any kernel address and execute a callback function. register_kprobe() establishes a probepoint and specifies the callback. Kprobes is useful for kernel debugging, non-intrusive instrumentation and testing. If in doubt, say "N". config DEBUG_STACK_USAGE bool "Stack utilization instrumentation" depends on DEBUG_KERNEL && X86 help Enables the display of the minimum amount of free stack which each task has ever had available in the sysrq-T and sysrq-P debug output. This option will slow down process creation somewhat. comment "Page alloc debug is incompatible with Software Suspend on i386" depends on DEBUG_KERNEL && SOFTWARE_SUSPEND && X86 config DEBUG_PAGEALLOC bool "Page alloc debugging" depends on DEBUG_KERNEL && !SOFTWARE_SUSPEND && X86 help Unmap pages from the kernel linear mapping after free_pages(). This results in a large slowdown, but helps to find certain types of memory corruptions. config 4KSTACKS bool "Use 4Kb for kernel stacks instead of 8Kb" depends on DEBUG_KERNEL && X86 help If you say Y here the kernel will use a 4Kb stacksize for the kernel stack attached to each process/thread. This facilitates running more threads on a system and also reduces the pressure on the VM subsystem for higher order allocations. This option will also use IRQ stacks to compensate for the reduced stackspace. config X86_FIND_SMP_CONFIG bool depends on X86_LOCAL_APIC || X86_VOYAGER && X86 default y config X86_MPPARSE bool depends on X86_LOCAL_APIC && !X86_VISWS && X86 default y # X86_64 # !SMP for now because the context switch early causes GPF in segment reloading # and the GS base checking does the wrong thing then, causing a hang. config CHECKING bool "Additional run-time checks" depends on DEBUG_KERNEL && !SMP && X86_64 help Enables some internal consistency checks for kernel debugging. You should normally say N. config INIT_DEBUG bool "Debug __init statements" depends on DEBUG_KERNEL && X86_64 help Fill __init and __initdata at the end of boot. This helps debugging illegal uses of __init and __initdata after initialization. config IOMMU_DEBUG depends on GART_IOMMU && DEBUG_KERNEL && X86_64 bool "Enable IOMMU debugging" help Force the IOMMU to on even when you have less than 4GB of memory and add debugging code. On overflow always panic. And allow to enable IOMMU leak tracing. Can be disabled at boot time with iommu=noforce. This will also enable scatter gather list merging. Currently not recommended for production code. When you use it make sure you have a big enough IOMMU/AGP aperture. Most of the options enabled by this can be set more finegrained using the iommu= command line options. See Documentation/x86_64/boot-options.txt for more details. config IOMMU_LEAK bool "IOMMU leak tracing" depends on DEBUG_KERNEL && X86_64 depends on IOMMU_DEBUG help Add a simple leak tracer to the IOMMU code. This is useful when you are debugging a buggy device driver that leaks IOMMU mappings. #config X86_REMOTE_DEBUG # bool "kgdb debugging stub" # X86 & X86_64 config KPROBES bool "Kprobes" depends on DEBUG_KERNEL help Kprobes allows you to trap at almost any kernel address and execute a callback function. register_kprobe() establishes a probepoint and specifies the callback. Kprobes is useful for kernel debugging, non-intrusive instrumentation and testing. If in doubt, say "N". endmenu


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