Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1menu "Kernel hacking"
2
3config TRACE_IRQFLAGS_SUPPORT
4 bool
5 default y
6
7source "lib/Kconfig.debug"
8
9config 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
19config 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
34config 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
42config 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
49config 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
61endmenu