arch/x86_64/Kconfig.debug

   1 menu "Kernel hacking"
   2
   3 config TRACE_IRQFLAGS_SUPPORT
   4         bool
   5         default y
   6
   7 source "lib/Kconfig.debug"
   8
   9 config DEBUG_RODATA
  10        bool "Write protect kernel read-only data structures"
  11        depends on DEBUG_KERNEL
  12        help
  13          Mark the kernel read-only data as write-protected in the pagetables,
  14          in order to catch accidental (and incorrect) writes to such const data.
  15          This option may have a slight performance impact because a portion
  16          of the kernel code won't be covered by a 2MB TLB anymore.
  17          If in doubt, say "N".
  18
  19 config IOMMU_DEBUG
  20        depends on IOMMU && DEBUG_KERNEL
  21        bool "Enable IOMMU debugging"
  22        help
  23          Force the IOMMU to on even when you have less than 4GB of
  24          memory and add debugging code. On overflow always panic. And
  25          allow to enable IOMMU leak tracing. Can be disabled at boot
  26          time with iommu=noforce. This will also enable scatter gather
  27          list merging.  Currently not recommended for production
  28          code. When you use it make sure you have a big enough
  29          IOMMU/AGP aperture.  Most of the options enabled by this can
  30          be set more finegrained using the iommu= command line
  31          options. See Documentation/x86_64/boot-options.txt for more
  32          details.
  33
  34 config IOMMU_LEAK
  35        bool "IOMMU leak tracing"
  36        depends on DEBUG_KERNEL
  37        depends on IOMMU_DEBUG
  38        help
  39          Add a simple leak tracer to the IOMMU code. This is useful when you
  40          are debugging a buggy device driver that leaks IOMMU mappings.
  41
  42 config DEBUG_STACKOVERFLOW
  43         bool "Check for stack overflows"
  44         depends on DEBUG_KERNEL
  45         help
  46           This option will cause messages to be printed if free stack space
  47           drops below a certain limit.
  48
  49 config DEBUG_STACK_USAGE
  50         bool "Stack utilization instrumentation"
  51         depends on DEBUG_KERNEL
  52         help
  53           Enables the display of the minimum amount of free stack which each
  54           task has ever had available in the sysrq-T and sysrq-P debug output.
  55
  56           This option will slow down process creation somewhat.
  57
  58 #config X86_REMOTE_DEBUG
  59 #       bool "kgdb debugging stub"
  60
  61 endmenu