IB/mlx5: Resolve soft lock on massive reg MRs

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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: e126ba97db ('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>

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Moshe Lazer 2016-10-27 16:36:42 +03:00 • committed by Doug Ledford

parent 16b0e0695a

commit 6bc1a656ab

2 changed files with 7 additions and 1 deletions

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2

drivers/infiniband/hw/mlx5/mlx5_ib.h

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6

drivers/infiniband/hw/mlx5/mr.c

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