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

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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>

...

This commit is contained in:

Mike Marciniszyn 2015-07-21 08:36:07 -04:00 • committed by Doug Ledford

parent e0238a6a36

commit d6f1c17e16

3 changed files with 16 additions and 4 deletions

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4

drivers/infiniband/hw/qib/qib_keys.c

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14

drivers/infiniband/hw/qib/qib_verbs.c

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2

drivers/infiniband/hw/qib/qib_verbs.h

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