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| author | Jiri Olsa <jolsa@redhat.com> | 2021-12-06 19:20:32 +0100 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2021-12-09 19:02:44 +0100 |
| commit | e1067a07cfbc5a36abad3752fafe4c79e06db1bb (patch) | |
| tree | 94d47183b6eae6f63d83a179728f99cc64b67ecf /COPYING | |
| parent | ftrace: Add cleanup to unregister_ftrace_direct_multi (diff) | |
| download | linux-e1067a07cfbc5a36abad3752fafe4c79e06db1bb.tar.xz linux-e1067a07cfbc5a36abad3752fafe4c79e06db1bb.zip | |
ftrace/samples: Add module to test multi direct modify interface
Adding ftrace-direct-multi-modify.ko kernel module that uses
modify_ftrace_direct_multi API. The core functionality is taken
from ftrace-direct-modify.ko kernel module and changed to fit
multi direct interface.
The init function creates kthread that periodically calls
modify_ftrace_direct_multi to change the trampoline address
for the direct ftrace_ops. The ftrace trace_pipe then shows
trace from both trampolines.
Link: https://lkml.kernel.org/r/20211206182032.87248-4-jolsa@kernel.org
Cc: Ingo Molnar <mingo@redhat.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'COPYING')
0 files changed, 0 insertions, 0 deletions