tree aa1a64585e9a27ae91aeb8ae229ac4636162d297
parent e0238a6a369eaa2e41b2c0321453272fb859f618
author Mike Marciniszyn <mike.marciniszyn@intel.com> 1437482167 -0400
committer Doug Ledford <dledford@redhat.com> 1440816886 -0400

IB/qib: Change lkey table allocation to support more MRs

The lkey table is allocated with with a get_user_pages() with an
order based on a number of index bits from a module parameter.

The underlying kernel code cannot allocate that many contiguous pages.

There is no reason the underlying memory needs to be physically
contiguous.

This patch:
- switches the allocation/deallocation to vmalloc/vfree
- caps the number of bits to 23 to insure at least 1 generation bit
  o this matches the module parameter description

Cc: stable@vger.kernel.org
Reviewed-by: Vinit Agnihotri <vinit.abhay.agnihotri@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>