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RDMA/mlx5: Implement mkeys management via LIFO queue

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Currently, mkeys are managed via xarray. This implementation leads to
a degradation in cases many MRs are unregistered in parallel, due to xarray
internal implementation, for example: deregistration 1M MRs via 64 threads
is taking ~15% more time[1].

Hence, implement mkeys management via LIFO queue, which solved the
degradation.

[1]
2.8us in kernel v5.19 compare to 3.2us in kernel v6.4

Signed-off-by: Shay Drory <shayd@nvidia.com>
Link: https://lore.kernel.org/r/fde3d4cfab0f32f0ccb231cd113298256e1502c5.1695283384.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Shay Drory 2023-09-21 11:07:16 +03:00 • committed by Leon Romanovsky
commit 57e7071683
3 changed files with 169 additions and 180 deletions
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