netdev - Re: [question] About triggering a region snapshot through the devlink cmd

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Message-ID: <20190927081333.GF3742@nanopsycho>
Date:   Fri, 27 Sep 2019 10:13:33 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     Yunsheng Lin <linyunsheng@...wei.com>
Cc:     jiri@...lanox.com, valex@...lanox.com, davem@...emloft.net,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linuxarm@...wei.com" <linuxarm@...wei.com>
Subject: Re: [question] About triggering a region snapshot through the
 devlink cmd

Fri, Sep 27, 2019 at 09:40:47AM CEST, linyunsheng@...wei.com wrote:
>Hi, Jiri & Alex
>
>    It seems that a region' snapshot is only created through the
>driver when some error is detected, for example:
>mlx4_crdump_collect_fw_health() -> devlink_region_snapshot_create()
>
>    We want to trigger a region' snapshot creation through devlink
>cmd, maybe by adding the "devlink region triger", because we want
>to check some hardware register/state when the driver or the hardware
>does not detect the error sometimes.
>
>Does about "devlink region triger" make sense?
>
>If yes, is there plan to implement it? or any suggestion to implement
>it?

Actually, the plan is co convert mlx4 to "devlink health" api. Mlx5
already uses that.

You should look into "devlink health".

>