ring-buffer: disable tracing switch
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- v1 Latest1 patch 7 repliesIn review
Patches in v1 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/1 | ring-buffer: buffer record on/off switchinclude/ kernel/ kernel/ | +106 | 6 replies |
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Cover letter [PATCH 0/1] ring-buffer: disable tracing switch
Stephen and Ingo,
I've been pressured into making this patch for mainline. It is a low risk patch, but I would like to get it into linux-next.
This patch adds a way for a kernel developer to stop all tracers from within the kernel and restart it from userspace. The previous APIs that allowed for kernel stopping the tracer did not allow for userspace to restart. This was mainly because the stopping could be for areas that are dangerous to be tracing, and allowing userspace to start them could risk the system stability.
This switch is made to let userspace interact with the kernel space in starting and stopping tracers.
The following patches are in:
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace.git
branch: devel
Steven Rostedt (1):
ring-buffer: buffer record on/off switch
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include/linux/ring_buffer.h | 3 + kernel/trace/ftrace.c | 8 +--- kernel/trace/ring_buffer.c | 101 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 106 insertions(+), 6 deletions(-)