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    SubjectRe: [PATCH 0/3] tracing/function-graph-tracer: signal interrupt triggering on output
    Frédéric Weisbecker wrote:
    > 2008/12/10 Steven Rostedt <rostedt@goodmis.org>:
    >> On Tue, 9 Dec 2008, Frederic Weisbecker wrote:
    >>
    >>> This patchset adds all the features to draw hardirq triggering on output
    >>> for the function graph tracer.
    >>> An example is given on the third patch.
    >>>
    >>> Just one question, on recordmcount.pl:
    >>>
    >>> my %text_sections = (
    >>> ".text" => 1,
    >>> ".sched.text" => 1,
    >>> ".spinlock.text" => 1,
    >>>
    >>> The .sched.text section is included inside .text, it's a subsection, I'm not sure
    >>> it's necessary to add it in text_sections. In doubt I added the new .irqentry.text
    >>>
    >> Matters what objdump -dr shows.
    >>
    >> $ objdump -dr kernel/sched.o | grep 'Disassembly'
    >> Disassembly of section .text:
    >> Disassembly of section .cpuinit.text:
    >> Disassembly of section .init.text:
    >> Disassembly of section .sched.text:
    >>
    >> Yep, .sched.text is needed. It is not about what gets linked by the
    >> linker. It is about what objdump shows, which is what recordmcount.pl uses
    >> to determine whether or not to record the mcount callers in that section.
    >
    >
    > Ok. I looked at a disassembly objdump on vmlinux to find those
    > subsections and didn't find it.
    > But I didn't see that recordmcount did its work on each build folder,
    You can see "scripts/Makefile.build" file, which uses recordmcount.pl to deal
    with each .o file when building.

    Liming Wang
    > I guess that these sections are
    > visible on the objects found in the subdirectories....
    >
    > Thanks.
    > --
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