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| author | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2017-03-03 22:15:39 +0100 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2017-03-25 01:51:49 +0100 |
| commit | 42c269c88dc146982a54a8267f71abc99f12852a (patch) | |
| tree | 2fecaaec16fe65febc290be5d67b396d0d0f75e3 /scripts | |
| parent | ftrace: Have function tracing start in early boot up (diff) | |
| download | linux-42c269c88dc146982a54a8267f71abc99f12852a.tar.xz linux-42c269c88dc146982a54a8267f71abc99f12852a.zip | |
ftrace: Allow for function tracing to record init functions on boot up
Adding a hook into free_reserve_area() that informs ftrace that boot up init
text is being free, lets ftrace safely remove those init functions from its
records, which keeps ftrace from trying to modify text that no longer
exists.
Note, this still does not allow for tracing .init text of modules, as
modules require different work for freeing its init code.
Link: http://lkml.kernel.org/r/1488502497.7212.24.camel@linux.intel.com
Cc: linux-mm@kvack.org
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Peter Zijlstra <peterz@infradead.org>
Requested-by: Todd Brandt <todd.e.brandt@linux.intel.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/recordmcount.c | 1 | ||||
| -rwxr-xr-x | scripts/recordmcount.pl | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/scripts/recordmcount.c b/scripts/recordmcount.c index aeb34223167c..16e086dcc567 100644 --- a/scripts/recordmcount.c +++ b/scripts/recordmcount.c @@ -412,6 +412,7 @@ static int is_mcounted_section_name(char const *const txtname) { return strcmp(".text", txtname) == 0 || + strcmp(".init.text", txtname) == 0 || strcmp(".ref.text", txtname) == 0 || strcmp(".sched.text", txtname) == 0 || strcmp(".spinlock.text", txtname) == 0 || diff --git a/scripts/recordmcount.pl b/scripts/recordmcount.pl index 0b6002b36f20..1633c3e6c0b9 100755 --- a/scripts/recordmcount.pl +++ b/scripts/recordmcount.pl @@ -130,6 +130,7 @@ if ($inputfile =~ m,kernel/trace/ftrace\.o$,) { # Acceptable sections to record. my %text_sections = ( ".text" => 1, + ".init.text" => 1, ".ref.text" => 1, ".sched.text" => 1, ".spinlock.text" => 1, |