tree 6e76546703284ab7d3e1a25c389b31511ff930f8
parent 16b0e0695a73b68d8ca40288c8f9614ef208917b
author Moshe Lazer <moshel@mellanox.com> 1477575402 +0300
committer Doug Ledford <dledford@redhat.com> 1479344624 -0500

IB/mlx5: Resolve soft lock on massive reg MRs

When calling reg_mr of large MRs (e.g. 4GB) from multiple processes
and MR caches can't supply the required amount of MRs the slow-path
of MR allocation may be used. In this case we need to serialize the
slow-path between the processes to avoid soft lock.

Fixes: e126ba97dba9 ('mlx5: Add driver for Mellanox Connect-IB adapters')
Signed-off-by: Moshe Lazer <moshel@mellanox.com>
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Reviewed-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>