[PATCH v2 0/9] Support running DPDK without hugetlbfs mountpoint

[Anatoly Burakov <anatoly.burakov@intel.com>]

This patchset adds a new command-line option "--in-memory",
which takes old debug options "--huge-unlink" and
"--no-shconf", and enhances them with additional
functionality. This will allow DPDK to reserve hugepages
anonymously instead of using hugetlbfs mountpoints. Coupled
with the fact that this option also effectively enables both
"--no-shconf" and "--huge-unlink" modes, DPDK will be able
to run entirely in memory and not create any shared files
while running - neither hugepages nor any runtime data.

This will, of course, disable secondary processes, but for
use-cases this is targeted at (containers etc.), this is
not a problem.

Older revisions had kernel support at 4.14+ and also
required a fairly new glibc, but now due to not using memfd
and using mmap() instead, minimum supported kernel version
has dropped to 3.8.

v1->v2 changes:
- Rebase on latest master
- Fix patch 5 to include check from patch 6 as commit message
  states

RFC->v1 changes:
- Dropped memfd, using anonymous mmap() instead
- Do not deprecate old command-line parameters, instead
  use them as they are, and add a deprecation notice to
  remove them in the next release.

Anatoly Burakov (9):
  fbarray: support no-shconf mode
  ipc: add support for no-shconf mode
  eal: add support for no-shconf for hugepage info
  eal: add support for no-shconf in hugepage data file
  eal: do not create runtime dir in no-shconf mode
  mem: add support for hugepage-unlink mode
  eal: add --in-memory option
  doc: add deprecation notice for EAL command line options
  mem: support in-memory mode

 doc/guides/rel_notes/deprecation.rst          |   5 +
 lib/librte_eal/bsdapp/eal/eal.c               |   3 +-
 lib/librte_eal/bsdapp/eal/eal_hugepage_info.c |   4 +
 lib/librte_eal/common/eal_common_fbarray.c    |  71 +++++----
 lib/librte_eal/common/eal_common_options.c    |  20 ++-
 lib/librte_eal/common/eal_common_proc.c       |  25 ++++
 lib/librte_eal/common/eal_internal_cfg.h      |   4 +
 lib/librte_eal/common/eal_options.h           |   2 +
 lib/librte_eal/linuxapp/eal/eal.c             |   3 +-
 .../linuxapp/eal/eal_hugepage_info.c          |  95 ++++++++----
 lib/librte_eal/linuxapp/eal/eal_memalloc.c    | 140 ++++++++++++------
 lib/librte_eal/linuxapp/eal/eal_memory.c      |  16 +-
 12 files changed, 271 insertions(+), 117 deletions(-)

-- 
2.17.1