IB/mlx5: Maintain a single emergency page

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The mlx5 driver needs to be able to issue invalidation to ODP MRs
even if it cannot allocate memory. To this end it preallocates
emergency pages to use when the situation arises.

This flow should be extremely rare enough, that we don't need
to worry about contention and therefore a single emergency page
is good enough.

Signed-off-by: Ilya Lesokhin <ilyal@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>

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Ilya Lesokhin 2018-03-13 15:18:48 +02:00 • committed by Doug Ledford

parent 65edd0e758

commit c44ef998f2

3 changed files with 37 additions and 22 deletions

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44

drivers/infiniband/hw/mlx5/main.c

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6

drivers/infiniband/hw/mlx5/mlx5_ib.h

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11

drivers/infiniband/hw/mlx5/mr.c

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