3 config TRACE_IRQFLAGS_SUPPORT
7 source "lib/Kconfig.debug"
10 bool "Write protect kernel read-only data structures"
11 depends on DEBUG_KERNEL
12 depends on !KPROBES # temporary for 2.6.22
14 Mark the kernel read-only data as write-protected in the pagetables,
15 in order to catch accidental (and incorrect) writes to such const data.
16 This option may have a slight performance impact because a portion
17 of the kernel code won't be covered by a 2MB TLB anymore.
21 depends on IOMMU && DEBUG_KERNEL
22 bool "Enable IOMMU debugging"
24 Force the IOMMU to on even when you have less than 4GB of
25 memory and add debugging code. On overflow always panic. And
26 allow to enable IOMMU leak tracing. Can be disabled at boot
27 time with iommu=noforce. This will also enable scatter gather
28 list merging. Currently not recommended for production
29 code. When you use it make sure you have a big enough
30 IOMMU/AGP aperture. Most of the options enabled by this can
31 be set more finegrained using the iommu= command line
32 options. See Documentation/x86_64/boot-options.txt for more
36 bool "IOMMU leak tracing"
37 depends on DEBUG_KERNEL
38 depends on IOMMU_DEBUG
40 Add a simple leak tracer to the IOMMU code. This is useful when you
41 are debugging a buggy device driver that leaks IOMMU mappings.
43 config DEBUG_STACKOVERFLOW
44 bool "Check for stack overflows"
45 depends on DEBUG_KERNEL
47 This option will cause messages to be printed if free stack space
48 drops below a certain limit.
50 config DEBUG_STACK_USAGE
51 bool "Stack utilization instrumentation"
52 depends on DEBUG_KERNEL
54 Enables the display of the minimum amount of free stack which each
55 task has ever had available in the sysrq-T and sysrq-P debug output.
57 This option will slow down process creation somewhat.
59 #config X86_REMOTE_DEBUG
60 # bool "kgdb debugging stub"