[0/2] ring-buffer: Fix a race between readers and resize checks

Message

Petr Pavlu May 17, 2024, 1:40 p.m. UTC

Fix a race between a reader swapping a new reader page into the
ring-buffer from rb_get_reader_page() and the rb_check_pages() check
invoked at the end of the resize operation in ring_buffer_resize().

Note that a similar problem with rb_check_pages() being executed with
concurrent readers looks to exist for ring_buffer_subbuf_order_set()
too. I plan to tackle it in a separate series.

Petr Pavlu (2):
  ring-buffer: Correct stale comments related to non-consuming readers
  ring-buffer: Fix a race between readers and resize checks

 kernel/trace/ring_buffer.c | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)


base-commit: ea5f6ad9ad9645733b72ab53a98e719b460d36a6