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| author |   Steven Rostedt <rostedt@goodmis.org> | 2008-11-13 00:09:35 -0500 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2008-11-13 09:49:22 +0100 |
| commit | 1696b2b0f44a8d42f3e6b1ea90c21790871c04d9 (patch) | |
| tree | 87f217120af535771b6249c50d9758c8765fd5f6 /kernel/trace | |
| parent | ftrace: rename trace_entries to buffer_size_kb (diff) | |
| download | linux-dev-1696b2b0f44a8d42f3e6b1ea90c21790871c04d9.tar.xz linux-dev-1696b2b0f44a8d42f3e6b1ea90c21790871c04d9.zip | |
ftrace: show buffer size in kilobytes
Impact: change the units of buffer_size_kb to kilobytes
This patch changes the units of the buffer_size_kb file to kilobytes.
Reading and writing to the file uses kilobytes as units. To help
users to know what units are used, the output of the file now
looks like:
# cat /debug/tracing/buffer_size_kb
1408
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/trace.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index b42d42056fa4..d664aae2e10a 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -2905,7 +2905,7 @@ tracing_entries_read(struct file *filp, char __user *ubuf, char buf[64]; int r; - r = sprintf(buf, "%lu\n", tr->entries); + r = sprintf(buf, "%lu\n", tr->entries >> 10); return simple_read_from_buffer(ubuf, cnt, ppos, buf, r); } @@ -2945,6 +2945,9 @@ tracing_entries_write(struct file *filp, const char __user *ubuf, atomic_inc(&max_tr.data[cpu]->disabled); } + /* value is in KB */ + val <<= 10; + if (val != global_trace.entries) { ret = ring_buffer_resize(global_trace.buffer, val); if (ret < 0) { |