source: trunk/packages/xen-3.1/xen-3.1/linux-2.6-xen-sparse/arch/i386/Kconfig.debug @ 34

Last change on this file since 34 was 34, checked in by hartmans, 18 years ago

Add xen and xen-common

File size: 2.8 KB
Line 
1menu "Kernel hacking"
2
3config TRACE_IRQFLAGS_SUPPORT
4        bool
5        default y
6
7source "lib/Kconfig.debug"
8
9config EARLY_PRINTK
10        bool "Early printk" if EMBEDDED && DEBUG_KERNEL
11        default y
12        help
13          Write kernel log output directly into the VGA buffer or to a serial
14          port.
15
16          This is useful for kernel debugging when your machine crashes very
17          early before the console code is initialized. For normal operation
18          it is not recommended because it looks ugly and doesn't cooperate
19          with klogd/syslogd or the X server. You should normally N here,
20          unless you want to debug such a crash.
21
22config DEBUG_STACKOVERFLOW
23        bool "Check for stack overflows"
24        depends on DEBUG_KERNEL
25        help
26          This option will cause messages to be printed if free stack space
27          drops below a certain limit.
28
29config DEBUG_STACK_USAGE
30        bool "Stack utilization instrumentation"
31        depends on DEBUG_KERNEL
32        help
33          Enables the display of the minimum amount of free stack which each
34          task has ever had available in the sysrq-T and sysrq-P debug output.
35
36          This option will slow down process creation somewhat.
37
38comment "Page alloc debug is incompatible with Software Suspend on i386"
39        depends on DEBUG_KERNEL && SOFTWARE_SUSPEND
40
41config DEBUG_PAGEALLOC
42        bool "Debug page memory allocations"
43        depends on DEBUG_KERNEL && !SOFTWARE_SUSPEND && !HUGETLBFS
44        help
45          Unmap pages from the kernel linear mapping after free_pages().
46          This results in a large slowdown, but helps to find certain types
47          of memory corruptions.
48
49config DEBUG_RODATA
50        bool "Write protect kernel read-only data structures"
51        depends on DEBUG_KERNEL
52        help
53          Mark the kernel read-only data as write-protected in the pagetables,
54          in order to catch accidental (and incorrect) writes to such const
55          data. This option may have a slight performance impact because a
56          portion of the kernel code won't be covered by a 2MB TLB anymore.
57          If in doubt, say "N".
58
59config 4KSTACKS
60        bool "Use 4Kb for kernel stacks instead of 8Kb"
61        depends on DEBUG_KERNEL
62        help
63          If you say Y here the kernel will use a 4Kb stacksize for the
64          kernel stack attached to each process/thread. This facilitates
65          running more threads on a system and also reduces the pressure
66          on the VM subsystem for higher order allocations. This option
67          will also use IRQ stacks to compensate for the reduced stackspace.
68
69config X86_FIND_SMP_CONFIG
70        bool
71        depends on X86_LOCAL_APIC || X86_VOYAGER
72        default y
73
74config X86_MPPARSE
75        bool
76        depends on X86_LOCAL_APIC && !X86_VISWS
77        default y
78
79config DOUBLEFAULT
80        default y
81        bool "Enable doublefault exception handler" if EMBEDDED
82        depends on !X86_NO_TSS
83        help
84          This option allows trapping of rare doublefault exceptions that
85          would otherwise cause a system to silently reboot. Disabling this
86          option saves about 4k and might cause you much additional grey
87          hair.
88
89endmenu
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