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RDMA/mlx5: Fix counter update on MR cache mkey creation

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After an mkey is created, update the counter for pending mkeys before
reshceduling the work that is filling the cache.

Rescheduling the work with a full MR cache entry and a wrong 'pending'
counter will cause us to miss disabling the fill_to_high_water flag.
Thus leaving the cache full but with an indication that it's still
needs to be filled up to it's full size (2 * limit).
Next time an mkey will be taken from the cache, we'll unnecessarily
continue the process of filling the cache to it's full size.

Fixes: 57e7071683 ("RDMA/mlx5: Implement mkeys management via LIFO queue")
Signed-off-by: Michael Guralnik <michaelgur@nvidia.com>
Link: https://patch.msgid.link/0f44f462ba22e45f72cb3d0ec6a748634086b8d0.1725362530.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Michael Guralnik 2024-09-03 14:24:48 +03:00 committed by Leon Romanovsky
parent 30e6bd8d3b
commit 6f5cd6ac9a
1 changed files with 1 additions and 1 deletions
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2
drivers/infiniband/hw/mlx5/mr.c
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@ -214,9 +214,9 @@ static void create_mkey_callback(int status, struct mlx5_async_work *context)
spin_lock_irqsave(&ent->mkeys_queue.lock, flags);
push_mkey_locked(ent, mkey_out->mkey);
ent->pending--;
/* If we are doing fill_to_high_water then keep going. */
queue_adjust_cache_locked(ent);
ent->pending--;
spin_unlock_irqrestore(&ent->mkeys_queue.lock, flags);
kfree(mkey_out);
}