[dm-devel] [PATCH v2 0/6] Multipath io_err_stat fixes

[Benjamin Marzinski]

I found an ABBA deadlock in the io_err_stat marginal path code, and in
the process of fixing it, noticed a potential crash on shutdown. This
patchset addresses both of the issues.

Changes from v1:

0002: use cleanup_mutex instead of cleanup_unlock as suggested by
Martin

0003: add pthread_testcancel and use cleanup_mutex instead of
cleanup_unlock as suggested by Martin. Also, make tmp_pathvec a constant
pointer, since it should always equal _pathvec.

0004-0006 are new patches to deal with io_err_stat issues from Martin's
review

Benjamin Marzinski (6):
  libmultipath: make find_err_path_by_dev() static
  multipathd: avoid io_err_stat crash during shutdown
  multipathd: avoid io_err_stat ABBA deadlock
  multipathd: use get_monotonic_time() in io_err_stat code
  multipathd: combine free_io_err_stat_path and destroy_directio_ctx
  multipathd: cleanup logging for marginal paths

 libmultipath/io_err_stat.c | 216 ++++++++++++++++---------------------
 multipathd/main.c          |  25 +++--
 2 files changed, 105 insertions(+), 136 deletions(-)

-- 
2.17.2