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8256e47cdc
The marker activation functions sits in kernel/marker.c. A hash table is used to keep track of the registered probes and armed markers, so the markers within a newly loaded module that should be active can be activated at module load time. marker_query has been removed. marker_get_first, marker_get_next and marker_release should be used as iterators on the markers. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Acked-by: "Frank Ch. Eigler" <fche@redhat.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Mike Mason <mmlnx@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
50 lines
1.5 KiB
Plaintext
50 lines
1.5 KiB
Plaintext
menuconfig INSTRUMENTATION
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bool "Instrumentation Support"
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default y
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---help---
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Say Y here to get to see options related to performance measurement,
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system-wide debugging, and testing. This option alone does not add any
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kernel code.
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If you say N, all options in this submenu will be skipped and
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disabled. If you're trying to debug the kernel itself, go see the
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Kernel Hacking menu.
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if INSTRUMENTATION
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config PROFILING
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bool "Profiling support (EXPERIMENTAL)"
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help
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Say Y here to enable the extended profiling support mechanisms used
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by profilers such as OProfile.
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config OPROFILE
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tristate "OProfile system profiling (EXPERIMENTAL)"
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depends on PROFILING
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depends on ALPHA || ARM || BLACKFIN || X86_32 || IA64 || M32R || MIPS || PARISC || PPC || S390 || SUPERH || SPARC || X86_64
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help
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OProfile is a profiling system capable of profiling the
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whole system, include the kernel, kernel modules, libraries,
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and applications.
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If unsure, say N.
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config KPROBES
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bool "Kprobes"
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depends on KALLSYMS && MODULES
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depends on X86_32 || IA64 || PPC || S390 || SPARC64 || X86_64 || AVR32
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help
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Kprobes allows you to trap at almost any kernel address and
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execute a callback function. register_kprobe() establishes
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a probepoint and specifies the callback. Kprobes is useful
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for kernel debugging, non-intrusive instrumentation and testing.
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If in doubt, say "N".
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config MARKERS
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bool "Activate markers"
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help
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Place an empty function call at each marker site. Can be
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dynamically changed for a probe function.
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endif # INSTRUMENTATION
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