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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2008-10-31 12:57:20 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-11-04 17:14:02 +0100 |
| commit | 71566a0d161edec70361b7f90f6e54af6a6d5d05 (patch) | |
| tree | 78d2d790ed4e20c179d2f61f2ed50ecbb6d5a451 /init | |
| parent | 7a895f53cda9d9362c30144e42c124a1ae996b9e (diff) | |
| download | linux-stable-71566a0d161edec70361b7f90f6e54af6a6d5d05.tar.gz linux-stable-71566a0d161edec70361b7f90f6e54af6a6d5d05.tar.bz2 linux-stable-71566a0d161edec70361b7f90f6e54af6a6d5d05.zip | |
tracing/fastboot: Enable boot tracing only during initcalls
Impact: modify boot tracer
We used to disable the initcall tracing at a specified time (IE: end
of builtin initcalls). But we don't need it anymore. It will be
stopped when initcalls are finished.
However we want two things:
_Start this tracing only after pre-smp initcalls are finished.
_Since we are planning to trace sched_switches at the same time, we
want to enable them only during the initcall execution.
For this purpose, this patch introduce two functions to enable/disable
the sched_switch tracing during boot.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'init')
| -rw-r--r-- | init/main.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/init/main.c b/init/main.c index 7e117a231af1..4b03cd5656ca 100644 --- a/init/main.c +++ b/init/main.c @@ -711,6 +711,7 @@ int do_one_initcall(initcall_t fn) it.caller = task_pid_nr(current); printk("calling %pF @ %i\n", fn, it.caller); it.calltime = ktime_get(); + enable_boot_trace(); } it.result = fn(); @@ -722,6 +723,7 @@ int do_one_initcall(initcall_t fn) printk("initcall %pF returned %d after %Ld usecs\n", fn, it.result, it.duration); trace_boot(&it, fn); + disable_boot_trace(); } msgbuf[0] = 0; @@ -882,7 +884,7 @@ static int __init kernel_init(void * unused) * we're essentially up and running. Get rid of the * initmem segments and start the user-mode stuff.. */ - stop_boot_trace(); + init_post(); return 0; } |