3 bool "Kernel debugging"
4 depends on (ALPHA || ARM || CRIS || H8300 || X86 || IA64 || M68K || M68KNOMMU || MIPS || PARISC || PPC32 || PPC64 || ARCH_S390 || SUPERH || SUPERH64 || SPARC32 || SPARC64 || USERMODE || V850 || X86_64)
6 Say Y here if you are developing drivers or trying to debug and
7 identify kernel problems.
10 bool "Magic SysRq key"
11 depends on DEBUG_KERNEL && (ALPHA || ARM || X86 || IA64 || M68K || MIPS || PARISC || PPC32 || PPC64 || ARCH_S390 || SUPERH || SUPERH64 || SPARC32 || SPARC64 || X86_64)
13 If you say Y here, you will have some control over the system even
14 if the system crashes for example during kernel debugging (e.g., you
15 will be able to flush the buffer cache to disk, reboot the system
16 immediately or dump some status information). This is accomplished
17 by pressing various keys while holding SysRq (Alt+PrintScreen). It
18 also works on a serial console (on PC hardware at least), if you
19 send a BREAK and then within 5 seconds a command keypress. The
20 keys are documented in <file:Documentation/sysrq.txt>. Don't say Y
21 unless you really know what this hack does.
24 bool "Magic SysRq key"
25 depends on DEBUG_KERNEL && (H8300 || M68KNOMMU || V850)
26 depends (USERMODE && MCONSOLE)
28 Enables console device to interpret special characters as
29 commands to dump state information.
32 bool "Debug memory allocations"
33 depends on DEBUG_KERNEL && (ALPHA || ARM || X86 || IA64 || M68K || MIPS || PARISC || PPC32 || PPC64 || ARCH_S390 || SPARC32 || SPARC64 || USERMODE || X86_64)
35 Say Y here to have the kernel do limited verification on memory
36 allocation as well as poisoning memory on free to catch use of freed
40 bool "Spinlock debugging"
41 depends on DEBUG_KERNEL && (ALPHA || ARM || X86 || IA64 || MIPS || PPC32 || (SUPERH && !SUPERH64) || SPARC32 || SPARC64 || USERMODE || X86_64)
43 Say Y here and build SMP to catch missing spinlock initialization
44 and certain other kinds of spinlock errors commonly made. This is
45 best used in conjunction with the NMI watchdog so that spinlock
46 deadlocks are also debuggable.
48 config DEBUG_SPINLOCK_SLEEP
49 bool "Sleep-inside-spinlock checking"
50 depends on DEBUG_KERNEL && (X86 || IA64 || MIPS || PPC32 || PPC64 || ARCH_S390 || SPARC32 || SPARC64)
52 If you say Y here, various routines which may sleep will become very
53 noisy if they are called with a spinlock held.
56 bool "Highmem debugging"
57 depends on DEBUG_KERNEL && HIGHMEM && (X86 || PPC32 || MIPS || SPARC32)
59 This options enables addition error checking for high memory systems.
60 Disable for production systems.
62 config DEBUG_BUGVERBOSE
63 bool "Verbose BUG() reporting (adds 70K)"
64 depends on DEBUG_KERNEL && (ARM || ARM26 || M68K || SPARC32 || SPARC64)
66 Say Y here to make BUG() panics output the file name and line number
67 of the BUG call as well as the EIP and oops trace. This aids
68 debugging but costs about 70-100K of memory.
71 bool "Compile the kernel with debug info"
72 depends on DEBUG_KERNEL && (ALPHA || CRIS || X86 || IA64 || M68K || MIPS || PARISC || PPC32 || PPC64 || ARCH_S390 || (SUPERH && !SUPERH64) || SPARC64 || V850 || X86_64)
74 If you say Y here the resulting kernel image will include
75 debugging info resulting in a larger kernel image.
76 Say Y here only if you plan to use gdb to debug the kernel.
77 If you don't debug the kernel, you can say N.
80 bool "Enable kernel debugging symbols"
81 depends on DEBUG_KERNEL && USERMODE
83 When this is enabled, the User-Mode Linux binary will include
84 debugging symbols. This enlarges the binary by a few megabytes,
85 but aids in tracking down kernel problems in UML. It is required
86 if you intend to do any kernel development.
88 If you're truly short on disk space or don't expect to report any
89 bugs back to the UML developers, say N, otherwise say Y.
93 bool "Compile the kernel with frame pointers"
94 depends on X86 || CRIS || M68KNOMMU || PARISC
96 If you say Y here the resulting kernel image will be slightly larger
97 and slower, but it will give very useful debugging information.
98 If you don't debug the kernel, you can say N, but we may not be able
99 to solve problems without frame pointers.