arch/x86/Kconfig.debug

1 # SPDX-License-Identifier: GPL-2.0
56 	  a full-blown printk console driver + klogd.
79 	bool "Set upper limit of TLB entries to flush one-by-one"
83 	X86-only for now.
86 	kernel flushes one-by-one instead of doing a full TLB flush. In
89 	to -1, the code flushes the whole TLB unconditionally. Otherwise,
107 	  code. When you use it make sure you have a big enough
110 	  options. See Documentation/x86/x86_64/boot-options.rst for more
138 	bool "port 0x80 based port-IO delay [recommended]"
144 	bool "port 0xed based port-IO delay"
147 	  often used as a hardware-debug port.
150 	bool "udelay based port-IO delay"
153 	  while not having any side-effect on the IO port space.
156 	bool "no port-IO delay"
158 	  No port-IO delay. Will break on old boxes that require port-IO
171 	bool "CPA self-test code"
174 	  Do change_page_attr() self-tests every 30 seconds.
177 	bool "Debug low-level entry code"
180 	  This option enables sanity checks in x86's low-level entry code.
250 	  a simplified version of the DWARF Call Frame Information standard.
253 	  frame pointer unwinder.  It also enables a 5-10% performance
254 	  improvement across the entire kernel compared to frame pointers.
257 	  by roughly 2-4MB, depending on your kernel config.
260 	bool "Frame pointer unwinder"
263 	  This option enables the frame pointer unwinder for unwinding kernel
268 	  overall performance will degrade by roughly 5-10%.
280 	  useful in many cases.  Unlike the other unwinders, it has no runtime