diff options
| author |   Wang YanQing <udknight@gmail.com> | 2013-09-14 12:59:16 +0800 |
|---|---|---|
| committer |   Steven Rostedt <rostedt@goodmis.org> | 2013-10-09 21:38:22 -0400 |
| commit | b9be6d026d327593784b042aab4fa27e2de9c825 (patch) | |
| tree | d54d923484f06479b39ab6b6b5c2a374d4801fe4 /kernel/trace | |
| parent | Linux 3.12-rc4 (diff) | |
| download | linux-dev-b9be6d026d327593784b042aab4fa27e2de9c825.tar.xz linux-dev-b9be6d026d327593784b042aab4fa27e2de9c825.zip | |
tracing: Show more exact help information about snapshot
The current "help" that comes out of the snapshot file when it is
not allocated looks like this:
# * Snapshot is freed *
#
# Snapshot commands:
# echo 0 > snapshot : Clears and frees snapshot buffer
# echo 1 > snapshot : Allocates snapshot buffer, if not already allocated.
# Takes a snapshot of the main buffer.
# echo 2 > snapshot : Clears snapshot buffer (but does not allocate)
# (Doesn't have to be '2' works with any number that
# is not a '0' or '1')
Echo 2 says that it does not allocate the buffer, which is correct,
but to be more consistent with "echo 0" it should also state
that it does not free.
Link: http://lkml.kernel.org/r/20130914045916.GA4243@udknight
Signed-off-by: Wang YanQing <udknight@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/trace.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 7974ba20557d..d5f7c4d84bcd 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -2760,7 +2760,7 @@ static void show_snapshot_main_help(struct seq_file *m) seq_printf(m, "# echo 0 > snapshot : Clears and frees snapshot buffer\n"); seq_printf(m, "# echo 1 > snapshot : Allocates snapshot buffer, if not already allocated.\n"); seq_printf(m, "# Takes a snapshot of the main buffer.\n"); - seq_printf(m, "# echo 2 > snapshot : Clears snapshot buffer (but does not allocate)\n"); + seq_printf(m, "# echo 2 > snapshot : Clears snapshot buffer (but does not allocate or free)\n"); seq_printf(m, "# (Doesn't have to be '2' works with any number that\n"); seq_printf(m, "# is not a '0' or '1')\n"); } |