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. 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 | 21 ++- 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, 272 insertions(+), 117 deletions(-) -- 2.17.0
