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| author | Ingo Molnar <mingo@elte.hu> | 2009-10-23 08:23:20 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-10-23 08:23:20 +0200 |
| commit | 43315956509ca6913764861ac7dec128b91eb1ec (patch) | |
| tree | 60fd5647f150a46e63093a41417c2eef3e776b3d /Documentation | |
| parent | x86, instruction decoder: Fix test_get_len build rules (diff) | |
| parent | perf tools: Unify debug messages mechanisms (diff) | |
| download | linux-43315956509ca6913764861ac7dec128b91eb1ec.tar.xz linux-43315956509ca6913764861ac7dec128b91eb1ec.zip | |
Merge branch 'perf/core' into perf/probes
Conflicts:
tools/perf/Makefile
Merge reason:
- fix the conflict
- pick up the pr_*() infrastructure to queue up dependent patch
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/kernel-parameters.txt | 7 | ||||
| -rw-r--r-- | Documentation/trace/ftrace-design.txt | 13 |
2 files changed, 18 insertions, 2 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 9107b387e91f..c8d1b2be28ef 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -779,6 +779,13 @@ and is between 256 and 4096 characters. It is defined in the file by the set_ftrace_notrace file in the debugfs tracing directory. + ftrace_graph_filter=[function-list] + [FTRACE] Limit the top level callers functions traced + by the function graph tracer at boot up. + function-list is a comma separated list of functions + that can be changed at run time by the + set_graph_function file in the debugfs tracing directory. + gamecon.map[2|3]= [HW,JOY] Multisystem joystick and NES/SNES/PSX pad support via parallel port (up to 5 devices per port) diff --git a/Documentation/trace/ftrace-design.txt b/Documentation/trace/ftrace-design.txt index 7003e10f10f5..641a1ef2a7ff 100644 --- a/Documentation/trace/ftrace-design.txt +++ b/Documentation/trace/ftrace-design.txt @@ -213,10 +213,19 @@ If you can't trace NMI functions, then skip this option. <details to be filled> -HAVE_FTRACE_SYSCALLS +HAVE_SYSCALL_TRACEPOINTS --------------------- -<details to be filled> +You need very few things to get the syscalls tracing in an arch. + +- Have a NR_syscalls variable in <asm/unistd.h> that provides the number + of syscalls supported by the arch. +- Implement arch_syscall_addr() that resolves a syscall address from a + syscall number. +- Support the TIF_SYSCALL_TRACEPOINT thread flags +- Put the trace_sys_enter() and trace_sys_exit() tracepoints calls from ptrace + in the ptrace syscalls tracing path. +- Tag this arch as HAVE_SYSCALL_TRACEPOINTS. HAVE_FTRACE_MCOUNT_RECORD |