netdev - Re: [PATCH mlx5-next 05/12] net/mlx5: Rate limit errors in command interface

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Date:   Wed, 27 Jun 2018 08:48:11 +0300
From:   Leon Romanovsky <leonro@...lanox.com>
To:     Doug Ledford <dledford@...hat.com>,
        Jason Gunthorpe <jgg@...lanox.com>
Cc:     RDMA mailing list <linux-rdma@...r.kernel.org>,
        Hadar Hen Zion <hadarh@...lanox.com>,
        Matan Barak <matanb@...lanox.com>,
        Michael J Ruhl <michael.j.ruhl@...el.com>,
        Noa Osherovich <noaos@...lanox.com>,
        Raed Salem <raeds@...lanox.com>,
        Yishai Hadas <yishaih@...lanox.com>,
        Saeed Mahameed <saeedm@...lanox.com>,
        linux-netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH mlx5-next 05/12] net/mlx5: Rate limit errors in command
 interface

On Sun, Jun 24, 2018 at 11:23:46AM +0300, Leon Romanovsky wrote:
> From: Leon Romanovsky <leonro@...lanox.com>
>
> Any error status returned by FW will trigger similar
> to the following error message in the dmesg.
>
> [   55.884355] mlx5_core 0000:00:04.0: mlx5_cmd_check:712:(pid 555):
> ALLOC_UAR(0x802) op_mod(0x0) failed, status limits exceeded(0x8),
> syndrome (0x0)
>
> Those prints are extremely valuable to diagnose issues with running
> system and it is important to keep them. However, not-so-careful user
> can trigger endless number of such prints by depleting HW resources
> and will spam dmesg.
>
> Rate limiting of such messages solves this issue.
>
> Signed-off-by: Leon Romanovsky <leonro@...lanox.com>
> ---
>  drivers/net/ethernet/mellanox/mlx5/core/cmd.c       | 11 ++++-------
>  drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h |  6 ++++++
>  2 files changed, 10 insertions(+), 7 deletions(-)
>

Thanks, applied to mlx5-next.

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