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d634f194d4
User Mode Linux can also benefit from earlyprintk. UML's earlyprintk writes kernel messages directly to stdout. Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
50 lines
1.3 KiB
Text
50 lines
1.3 KiB
Text
menu "Kernel hacking"
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source "lib/Kconfig.debug"
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config GPROF
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bool "Enable gprof support"
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depends on DEBUG_INFO && FRAME_POINTER
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help
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This allows profiling of a User-Mode Linux kernel with the gprof
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utility.
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See <http://user-mode-linux.sourceforge.net/old/gprof.html> for more
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details.
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If you're involved in UML kernel development and want to use gprof,
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say Y. If you're unsure, say N.
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config GCOV
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bool "Enable gcov support"
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depends on DEBUG_INFO
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help
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This option allows developers to retrieve coverage data from a UML
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session.
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See <http://user-mode-linux.sourceforge.net/old/gprof.html> for more
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details.
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If you're involved in UML kernel development and want to use gcov,
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say Y. If you're unsure, say N.
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config DEBUG_STACK_USAGE
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bool "Stack utilization instrumentation"
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default N
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help
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Track the maximum kernel stack usage - this will look at each
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kernel stack at process exit and log it if it's the deepest
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stack seen so far.
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This option will slow down process creation and destruction somewhat.
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config EARLY_PRINTK
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bool "Early printk"
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default y
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---help---
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Write kernel log output directly to stdout.
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This is useful for kernel debugging when your machine crashes very
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early before the console code is initialized.
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endmenu
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