Hi,
This series of patches improves backup instances of the persistent
ring buffer. Since backup instances are a kind of snapshot of the
persistent ring buffer, it should be readonly. And if it is readonly
there is no reason to keep it after reading all data via trace_pipe
because the data has been consumed.
Thus, [1/2] makes backup instances readonly (not able to write any
events, cleanup trace, change buffer size). Also, [2/2] removes the
backup instance after consuming all data via trace_pipe.
With this improvements, even if we makes a backup instance (using
the same amount of memory of the persistent ring buffer), it will
be removed after reading the data automatically.
---
Masami Hiramatsu (Google) (2):
tracing: Make the backup instance readonly
tracing: Add autoremove feature to the backup instance
kernel/trace/trace.c | 155 ++++++++++++++++++++++++++++++++++++-------
kernel/trace/trace.h | 12 +++
kernel/trace/trace_events.c | 14 +++-
3 files changed, 153 insertions(+), 28 deletions(-)
--
Masami Hiramatsu (Google) <[email protected]>
