This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / i386 / Kconfig.debug

diff --git a/arch/i386/Kconfig.debug b/arch/i386/Kconfig.debug
new file mode 100644 (file)
index 0000000..cf069b7
--- /dev/null
+++ b/arch/i386/Kconfig.debug
@@ -0,0 +1,80 @@
+menu "Kernel hacking"
+
+source "lib/Kconfig.debug"
+
+config EARLY_PRINTK
+       bool "Early printk" if EMBEDDED
+       default y
+       help
+         Write kernel log output directly into the VGA buffer or to a serial
+         port.
+
+         This is useful for kernel debugging when your machine crashes very
+         early before the console code is initialized. For normal operation
+         it is not recommended because it looks ugly and doesn't cooperate
+         with klogd/syslogd or the X server. You should normally N here,
+         unless you want to debug such a crash.
+
+config DEBUG_STACKOVERFLOW
+       bool "Check for stack overflows"
+       depends on DEBUG_KERNEL
+
+config KPROBES
+       bool "Kprobes"
+       depends on DEBUG_KERNEL
+       help
+         Kprobes allows you to trap at almost any kernel address and
+         execute a callback function.  register_kprobe() establishes
+         a probepoint and specifies the callback.  Kprobes is useful
+         for kernel debugging, non-intrusive instrumentation and testing.
+         If in doubt, say "N".
+
+config DEBUG_STACK_USAGE
+       bool "Stack utilization instrumentation"
+       depends on DEBUG_KERNEL
+       help
+         Enables the display of the minimum amount of free stack which each
+         task has ever had available in the sysrq-T and sysrq-P debug output.
+
+         This option will slow down process creation somewhat.
+
+config DEBUG_PAGEALLOC
+       bool "Page alloc debugging"
+       depends on DEBUG_KERNEL
+       help
+         Unmap pages from the kernel linear mapping after free_pages().
+         This results in a large slowdown, but helps to find certain types
+         of memory corruptions.
+
+config 4KSTACKS
+       bool "Use 4Kb for kernel stacks instead of 8Kb"
+       help
+         If you say Y here the kernel will use a 4Kb stacksize for the
+         kernel stack attached to each process/thread. This facilitates
+         running more threads on a system and also reduces the pressure
+         on the VM subsystem for higher order allocations. This option
+         will also use IRQ stacks to compensate for the reduced stackspace.
+
+config SCHEDSTATS
+       bool "Collect scheduler statistics"
+       depends on DEBUG_KERNEL && PROC_FS
+       help
+         If you say Y here, additional code will be inserted into the
+         scheduler and related routines to collect statistics about
+         scheduler behavior and provide them in /proc/schedstat.  These
+         stats may be useful for both tuning and debugging the scheduler
+         If you aren't debugging the scheduler or trying to tune a specific
+         application, you can say N to avoid the very slight overhead
+         this adds.
+
+config X86_FIND_SMP_CONFIG
+       bool
+       depends on X86_LOCAL_APIC || X86_VOYAGER
+       default y
+
+config X86_MPPARSE
+       bool
+       depends on X86_LOCAL_APIC && !X86_VISWS
+       default y
+
+endmenu