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| author | Ming Lei <ming.lei@canonical.com> | 2011-09-27 22:54:41 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2011-09-27 22:54:41 +0200 |
| commit | c3dc2f14622a06488f11452b6efd1e02c5a8548b (patch) | |
| tree | d1fc5bc15c8fc593457fffd9e90e66498c14e196 /kernel/trace | |
| parent | PM / Runtime: Introduce trace points for tracing rpm_* functions (diff) | |
| download | linux-c3dc2f14622a06488f11452b6efd1e02c5a8548b.tar.xz linux-c3dc2f14622a06488f11452b6efd1e02c5a8548b.zip | |
PM / Runtime: Replace dev_dbg() with trace_rpm_*()
This patch replaces dev_dbg with trace_rpm_* inside
the three important functions:
rpm_idle
rpm_suspend
rpm_resume
Trace points have the below advantages compared with dev_dbg:
- trace points include much runtime information(such as
running cpu, current task, ...)
- most of linux distributions may disable "verbose debug"
driver debug compile switch, so it is very difficult to
report/debug runtime pm related problems from distribution
users without this kind of debug information.
- for upstream kernel users, enableing the debug switch will
produce many useless "rpm_resume" output, and it is very noise.
- dev_dbg inside rpm_suspend/rpm_resume may have some effects
on runtime pm behaviour of console devicer
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'kernel/trace')
0 files changed, 0 insertions, 0 deletions