arch/x86/Kconfig.debug

1 # SPDX-License-Identifier: GPL-2.0
50 	  a full-blown printk console driver + klogd.
70 	bool "Set upper limit of TLB entries to flush one-by-one"
73 	  X86-only for now.
76 	  kernel flushes one-by-one instead of doing a full TLB flush. In
79 	  to -1, the code flushes the whole TLB unconditionally. Otherwise,
97 	  code. When you use it make sure you have a big enough
100 	  options. See Documentation/arch/x86/x86_64/boot-options.rst for more
128 	bool "port 0x80 based port-IO delay [recommended]"
134 	bool "port 0xed based port-IO delay"
137 	  often used as a hardware-debug port.
140 	bool "udelay based port-IO delay"
143 	  while not having any side-effect on the IO port space.
146 	bool "no port-IO delay"
148 	  No port-IO delay. Will break on old boxes that require port-IO
161 	bool "CPA self-test code"
164 	  Do change_page_attr() self-tests every 30 seconds.
167 	bool "Debug low-level entry code"
170 	  This option enables sanity checks in x86's low-level entry code.
240 	  a simplified version of the DWARF Call Frame Information standard.
243 	  frame pointer unwinder.  It also enables a 5-10% performance
244 	  improvement across the entire kernel compared to frame pointers.
247 	  by roughly 2-4MB, depending on your kernel config.
250 	bool "Frame pointer unwinder"
254 	  This option enables the frame pointer unwinder for unwinding kernel
259 	  overall performance will degrade by roughly 5-10%.
271 	  useful in many cases.  Unlike the other unwinders, it has no runtime