3d44223327
This adds kernel/smp.c which contains helpers for IPI function calls. In addition to supporting the existing smp_call_function() in a more efficient manner, it also adds a more scalable variant called smp_call_function_single() for calling a given function on a single CPU only. The core of this is based on the x86-64 patch from Nick Piggin, lots of changes since then. "Alan D. Brunelle" <Alan.Brunelle@hp.com> has contributed lots of fixes and suggestions as well. Also thanks to Paul E. McKenney <paulmck@linux.vnet.ibm.com> for reviewing RCU usage and getting rid of the data allocation fallback deadlock. Acked-by: Ingo Molnar <mingo@elte.hu> Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
44 lines
964 B
Text
44 lines
964 B
Text
#
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# General architecture dependent options
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#
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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 HAVE_OPROFILE
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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 HAVE_OPROFILE
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def_bool 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 HAVE_KPROBES
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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 KRETPROBES
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def_bool y
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depends on KPROBES && HAVE_KRETPROBES
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config HAVE_KPROBES
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def_bool n
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config HAVE_KRETPROBES
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def_bool n
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config HAVE_DMA_ATTRS
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def_bool n
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config USE_GENERIC_SMP_HELPERS
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def_bool n
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