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a9064f676e
The set_ftrace_file lists both functions that are filtered, as well as
function probes (triggers) that are attached to a function, like traceon or
stacktrace, etc. The reading of this file is not as trivial as most pseudo
files are, and there's been various bugs that have appeared in the past
when there's a mix of probes and functions listed. There's also a difference
when reading the file using dd with a block size of 1.
This test performs the following:
o Resets set_ftrace_filter
o Makes sure only "#### all functions enabled ####" is listed
(All checks uses cat, and dd with bs=1 and bs=100)
o Adds a traceon trigger to schedule
o Checks if only "#### all function enabled ####" and the trigger is there.
o Adds tracing of schedule
o Checks if only schedule and the trigger is there
o Adds tracing of do_IRQ as well
o Checks if only schedule, do_IRQ and the trigger is there
o Adds a traceon trigger to do_IRQ
o Checks if only schedule, do_IRQ and both triggers are there
o Removes tracing of do_IRQ
o Checks if only schedule and both triggers are there
o Removes tracing of schedule
o Checks if only "#### all functions enabled ####" and both triggers are there
o Removes the triggers
o Checks if only "#### all functions enabled ####" is there
o Adds tracing of schedule
o Checks if only schedule is there
o Adds tracing of do_IRQ
o Checks if only schedule and do_IRQ are there
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.