[ovs-dev] [worker 00/12] Implement "worker process" to avoid blocking flow setup

[Ben Pfaff]

ovs-vswitchd occasionally needs to do some activities that may block
in the kernel unavoidably.  This patch series changes ovs-vswitchd to
do these activities in a separate "worker process".

Ben Pfaff (12):
  socket-util: Remove 'passcred' parameter from make_unix_socket().
  socket-util: New function xset_nonblocking().
  socket-util: Add functions for sending fds over Unix domain sockets.
  util: Introduce "subprogram_name" to identify subprocesses and
    threads.
  daemon: Factor out code into new function
    fork_and_wait_for_startup().
  daemon: Factor out code into new function daemonize_post_detach().
  vlog: Add VLOG_ABORT() to log and call abort().
  worker: New library for breaking a daemon into multiple processes.
  vlog: Use system calls instead of stdio to write log files.
  vlog: Use worker process to write to log file.
  shash: New functions smap_from_json(), smap_to_json().
  system-stats: Run as part of worker process.

 NEWS                        |    4 +-
 include/sparse/sys/socket.h |   31 +++
 lib/automake.mk             |    4 +-
 lib/daemon.c                |   69 +++++--
 lib/daemon.h                |    3 +
 lib/fatal-signal.c          |    4 +-
 lib/process.c               |    6 +-
 lib/shash.c                 |   39 ++++-
 lib/shash.h                 |    6 +-
 lib/signals.c               |    6 +-
 lib/socket-util.c           |  278 +++++++++++++++++++++++++--
 lib/socket-util.h           |   30 +++-
 lib/stream-unix.c           |    4 +-
 lib/util.c                  |   23 ++-
 lib/util.h                  |    3 +
 lib/vlog.c                  |  128 +++++++++++--
 lib/vlog.h                  |   16 +-
 lib/worker.c                |  447 +++++++++++++++++++++++++++++++++++++++++++
 lib/worker.h                |   68 +++++++
 tests/test-unix-socket.c    |    6 +-
 utilities/ovs-appctl.8.in   |   10 +
 vswitchd/bridge.c           |   59 ++++--
 vswitchd/ovs-vswitchd.c     |    5 +
 vswitchd/system-stats.c     |  165 +++++++++++++++-
 vswitchd/system-stats.h     |    8 +-
 25 files changed, 1326 insertions(+), 96 deletions(-)
 create mode 100644 lib/worker.c
 create mode 100644 lib/worker.h

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1.7.2.5