kdump: unable to dump to network with Mellanox ethernet adapter

Solution Verified - Updated -

Issue

  • Unable to dump to network with blacklisted module mlx4_core
  • kdump doesn't work with Mellanox Ethernet card
  • Can't kdump to NFS share
  • The mkdumprd kernel module blacklist code seems to be preventing extra modules from loading if they are in the blacklist
  • Memory usage by mlx4_core is high in kdump environment

Environment

  • Red Hat Enterprise Linux 6.4, 6.5, 6.6 and 7.0

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