IB/qib: Support creating qps with GFP_NOIO flag

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commit fbbeb8632b upstream.

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.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Vinit Agnihotri 2016-01-11 12:57:25 -05:00 • committed by Greg Kroah-Hartman

parent 7bf68a0afc

commit e759d3185f

1 changed files with 32 additions and 14 deletions

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drivers/infiniband/hw/qib/qib_qp.c

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