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有如下文本：

config KEXEC_CORE

bool

config OPROFILE

tristate "OProfile system profiling"

depends on PROFILING

depends on HAVE_OPROFILE

select RING_BUFFER

select RING_BUFFER_ALLOW_SWAP

help

OProfile is a profiling system capable of profiling the

whole system, include the kernel, kernel modules, libraries,

and applications.

If unsure, say N.

config OPROFILE_EVENT_MULTIPLEX

bool "OProfile multiplexing support (EXPERIMENTAL)"

default n

depends on OPROFILE && X86

help

The number of hardware counters is limited. The multiplexing

feature enables OProfile to gather more events than counters

are provided by the hardware. This is realized by switching

between events at an user specified time interval.

If unsure, say N.

config HAVE_OPROFILE

bool

比如說搜索OPROFILE，就可以把OPROFILE所在行到下個config開頭的行之間的內容顯示在字符終端上

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