[sheepdog] [sheepdog/sheepdog] cbe755: Remove WQ_UNLIMITED and change the limit of thread...

[Hitoshi Mitake]

  Branch: refs/heads/master
  Home:   https://github.com/sheepdog/sheepdog
  Commit: cbe755af178566fa2aa8b0b18e2b8d50c1e74ec7
      https://github.com/sheepdog/sheepdog/commit/cbe755af178566fa2aa8b0b18e2b8d50c1e74ec7
  Author: Takashi Menjo <menjo.takashi at lab.ntt.co.jp>
  Date:   2017-01-19 (Thu, 19 Jan 2017)

  Changed paths:
    M dog/benchmark.c
    M include/work.h
    M lib/work.c
    M sheep/sheep.c
    M tests/unit/lib/test_work.c
    M tests/unit/sheep/test_recovery.c

  Log Message:
  -----------
  Remove WQ_UNLIMITED and change the limit of threads for WQ_DYNAMIC

This patch deletes WQ_UNLIMITED option because, with this option,
sheep may consume a very large amount of memory (in some cases,
to be killed by OOM-killer) by creating worker threads infinitely.

This patch also changes the upper limit for the number of threads
for WQ_DYNAMIC option from "#nodes*2" to "max(#nodes,#cores,16)*2".

Signed-off-by: Teruaki Ishizaki <ishizaki.teruaki at lab.ntt.co.jp>
Signed-off-by: Takashi Menjo <menjo.takashi at lab.ntt.co.jp>


  Commit: 729e66ae8c1e04236ecb9939c462d7155a6034b3
      https://github.com/sheepdog/sheepdog/commit/729e66ae8c1e04236ecb9939c462d7155a6034b3
  Author: Hitoshi Mitake <mitake.hitoshi at gmail.com>
  Date:   2017-01-19 (Thu, 19 Jan 2017)

  Changed paths:
    M dog/benchmark.c
    M include/work.h
    M lib/work.c
    M sheep/sheep.c
    M tests/unit/lib/test_work.c
    M tests/unit/sheep/test_recovery.c

  Log Message:
  -----------
  Merge pull request #350 from tmenjo/fix-max-threads

Remove WQ_UNLIMITED and change the limit of threads for WQ_DYNAMIC


Compare: https://github.com/sheepdog/sheepdog/compare/6717ab2dec2e...729e66ae8c1e