linux-kernel - [for-next][PATCH 00/16] tracing: Add dynamic sub-buffer size for 6.8

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Message-ID: <20231221161024.478795180@goodmis.org>
Date: Thu, 21 Dec 2023 11:10:24 -0500
From: Steven Rostedt <rostedt@...dmis.org>
To: linux-kernel@...r.kernel.org
Cc: Masami Hiramatsu <mhiramat@...nel.org>,
 Mark Rutland <mark.rutland@....com>,
 Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
 Andrew Morton <akpm@...ux-foundation.org>
Subject: [for-next][PATCH 00/16] tracing: Add dynamic sub-buffer size for 6.8

  git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace.git
trace/for-next

Head SHA1: 3cb3091138ca0921c4569bcf7ffa062519639b6a


Steven Rostedt (Google) (11):
      ring-buffer: Clear pages on error in ring_buffer_subbuf_order_set() failure
      ring-buffer: Do no swap cpu buffers if order is different
      ring-buffer: Make sure the spare sub buffer used for reads has same size
      tracing: Update snapshot order along with main buffer order
      tracing: Stop the tracing while changing the ring buffer subbuf size
      ring-buffer: Keep the same size when updating the order
      ring-buffer: Just update the subbuffers when changing their allocation order
      ring-buffer: Add documentation on the buffer_subbuf_order file
      ringbuffer/selftest: Add basic selftest to test changing subbuf order
      tracing: Update subbuffer with kilobytes not page order
      ring-buffer: Use subbuf_order for buffer page masking

Tzvetomir Stoyanov (VMware) (5):
      ring-buffer: Have ring_buffer_print_page_header() be able to access ring_buffer_iter
      ring-buffer: Page size per ring buffer
      ring-buffer: Add interface for configuring trace sub buffer size
      ring-buffer: Set new size of the ring buffer sub page
      ring-buffer: Read and write to ring buffers with custom sub buffer size

----
 Documentation/trace/ftrace.rst                     |  21 +
 include/linux/ring_buffer.h                        |  17 +-
 kernel/trace/ring_buffer.c                         | 428 ++++++++++++++++-----
 kernel/trace/ring_buffer_benchmark.c               |  10 +-
 kernel/trace/trace.c                               | 155 +++++++-
 kernel/trace/trace.h                               |   1 +
 kernel/trace/trace_events.c                        |  59 ++-
 .../test.d/00basic/ringbuffer_subbuf_size.tc       |  95 +++++
 8 files changed, 658 insertions(+), 128 deletions(-)
 create mode 100644 tools/testing/selftests/ftrace/test.d/00basic/ringbuffer_subbuf_size.tc