Messages in this thread | | | From | Vaibhav Nagarnaik <> | Date | Tue, 28 May 2013 12:34:23 -0700 | Subject | Re: [PATCH] tracing: Fix file mode of free_buffer |
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On Sun, May 26, 2013 at 1:52 AM, Wang YanQing <udknight@gmail.com> wrote: > Commit 4f271a2a60c748599b30bb4dafff30d770439b96 > (tracing: Add a proc file to stop tracing and free buffer) > implement a method to free up ring buffer in kernel memory > in the release code path of free_buffer's fd. > > Then we don't need read/write support for free_buffer, > indeed we just have a dummy write fop, and don't implement read fop. > > So the 0200 is more reasonable file mode for free_buffer than > the current file mode 0644. > > Signed-off-by: Wang YanQing <udknight@gmail.com>
Acked-by: Vaibhav Nagarnaik <vnagarnaik@google.com>
Vaibhav Nagarnaik
> --- > kernel/trace/trace.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c > index ae6fa2d..02d9875 100644 > --- a/kernel/trace/trace.c > +++ b/kernel/trace/trace.c > @@ -5927,7 +5927,7 @@ init_tracer_debugfs(struct trace_array *tr, struct dentry *d_tracer) > trace_create_file("buffer_total_size_kb", 0444, d_tracer, > tr, &tracing_total_entries_fops); > > - trace_create_file("free_buffer", 0644, d_tracer, > + trace_create_file("free_buffer", 0200, d_tracer, > tr, &tracing_free_buffer_fops); > > trace_create_file("trace_marker", 0220, d_tracer, > -- > 1.7.12.4.dirty
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