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| author | Steven Rostedt (Red Hat) <rostedt@goodmis.org> | 2014-04-30 01:54:37 +0400 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2014-04-30 16:40:05 +0400 |
| commit | b1169cc69ba96b124df820904a6d3eb775491d7f (patch) | |
| tree | 95927d3a0c262c94def2d76b7f591e9d8ad46385 /kernel/trace/trace.h | |
| parent | f4874261049e3abdd481359d82cafa5068369ebd (diff) | |
| download | linux-b1169cc69ba96b124df820904a6d3eb775491d7f.tar.xz | |
tracing: Remove mock up poll wait function
Now that the ring buffer has a built in way to wake up readers
when there's data, using irq_work such that it is safe to do it
in any context. But it was still using the old "poor man's"
wait polling that checks every 1/10 of a second to see if it
should wake up a waiter. This makes the latency for a wake up
excruciatingly long. No need to do that anymore.
Completely remove the different wait_poll types from the tracers
and have them all use the default one now.
Reported-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace.h')
| -rw-r--r-- | kernel/trace/trace.h | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 8624b5041466..3b3e09e61f33 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -338,7 +338,6 @@ struct tracer_flags { * @stop: called when tracing is paused (echo 0 > tracing_enabled) * @open: called when the trace file is opened * @pipe_open: called when the trace_pipe file is opened - * @wait_pipe: override how the user waits for traces on trace_pipe * @close: called when the trace file is released * @pipe_close: called when the trace_pipe file is released * @read: override the default read callback on trace_pipe @@ -357,7 +356,6 @@ struct tracer { void (*stop)(struct trace_array *tr); void (*open)(struct trace_iterator *iter); void (*pipe_open)(struct trace_iterator *iter); - void (*wait_pipe)(struct trace_iterator *iter); void (*close)(struct trace_iterator *iter); void (*pipe_close)(struct trace_iterator *iter); ssize_t (*read)(struct trace_iterator *iter, @@ -566,8 +564,6 @@ void trace_init_global_iter(struct trace_iterator *iter); void tracing_iter_reset(struct trace_iterator *iter, int cpu); -void poll_wait_pipe(struct trace_iterator *iter); - void tracing_sched_switch_trace(struct trace_array *tr, struct task_struct *prev, struct task_struct *next, |