[DPDK/ethdev Bug 1631] PMD does not work with –no-huge EAL command line parameter

[bugzilla at dpdk.org]

https://bugs.dpdk.org/show_bug.cgi?id=1631

            Bug ID: 1631
           Summary: PMD does not work with –no-huge EAL command line
                    parameter
           Product: DPDK
           Version: unspecified
          Hardware: All
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: ethdev
          Assignee: dev at dpdk.org
          Reporter: nandinipersad361 at gmail.com
  Target Milestone: ---

Currently, the DPDK does not store any information about memory allocated by
malloc() (for example, NUMA node, physical address), hence PMDs do not work
when the --no-huge command line parameter is supplied to EAL. This happens when
using non-IOMMU based UIO drivers (i.e. igb_uio or uio_pci_generic) or when
IOVA mode is explicitly set to use physical addresses (via the --iova-mode=pa
EAL parameter).

Implication:
Sending and receiving data with PMD will not work. Unit tests checking
--no-huge operation will fail if there is a device bound to the PMD
(eal_flags_n_opt_autotest, eal_flags_no_huge_autotest,
eal_flags_vdev_opt_autotest, eal_flags_misc_autotest).

Resolution/Workaround:
Use huge page memory or use VFIO to map devices.

Affected Environment/Platform:
Systems running the DPDK on Linux

Driver/Module:
Poll Mode Driver (PMD).

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