IB/qib: Support creating qps with GFP_NOIO flag

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The current code is problematic when the QP creation and ipoib is used to
support NFS and NFS desires to do IO for paging purposes. In that case, the
GFP_KERNEL allocation in qib_qp.c causes a deadlock in tight memory
situations.

This fix adds support to create queue pair with GFP_NOIO flag for connected
mode only to cleanly fail the create queue pair in those situations.

Cc: <stable@vger.kernel.org> # 3.16+
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Vinit Agnihotri <vinit.abhay.agnihotri@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

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Vinit Agnihotri 2016-01-11 12:57:25 -05:00 • committed by Doug Ledford

parent 65487fdc0c

commit fbbeb8632b

1 changed files with 32 additions and 14 deletions

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drivers/infiniband/hw/qib/qib_qp.c

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