netdev - Re: [RFC PATCH iproute2-next V2] System specification exception API

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Date:   Thu, 27 Sep 2018 16:34:32 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     Eran Ben Elisha <eranbe@...lanox.com>
Cc:     netdev@...r.kernel.org,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        Jiri Pirko <jiri@...lanox.com>,
        Stephen Hemminger <stephen@...workplumber.org>,
        Andrew Lunn <andrew@...n.ch>, "Tobin C. Harding" <me@...in.cc>,
        Ariel Almog <ariela@...lanox.com>,
        Tal Alon <talal@...lanox.com>
Subject: Re: [RFC PATCH iproute2-next V2] System specification exception API

Thu, Sep 27, 2018 at 04:02:48PM CEST, eranbe@...lanox.com wrote:
>
>
>On 9/27/2018 3:47 PM, Jiri Pirko wrote:
>> Wed, Sep 26, 2018 at 01:52:58PM CEST, eranbe@...lanox.com wrote:
>> > The exception spec is targeted for Real Time Alerting, in order to know when
>> > something bad had happened to a PCI device
>> > - Provide alert debug information
>> > - Self healing
>> > - If problem needs vendor support, provide a way to gather all needed debugging
>> >   information.
>> > 
>> > The exception mechanism contains condition checkers which sense for malfunction. Upon a condition hit,
>> > actions such as logs and correction can be taken.
>> > 
>> > The condition checkers are divided into the following groups
>> > - Hardware - a checker which is triggered by the device due to
>> >   malfunction.
>> > - Software - a checker which is triggered by the software due to
>> >   malfunction.
>> 
>> What do you mean by a "software malfunction", a "FW malfunction"?
>> Also, I don't see this 2 groups in the man.
>
>Software malfunction can be a Transmit error (caused by bad send request).

Sorry, but I still don't undestand what "software malfuntion" are you
talking about. Could you be more specific please?


>FW/HW malfunction can be any catastrophic error report (the ones that should
>be exposed to driver).
>The comment here was to highlight that we can support different kinds of
>condition groups.
>If for a specific condition, we will need to highlight it is SW/HW, we can
>concatenate it to its name.
>
>Eran
>
>> 
>> 
>> > Both groups of condition checkers can be triggered due to error event or due to a periodic check.
>> > 
>> > Actions are the way to handle those events. Action can be in one of the
>> > following groups:
>> > - Dump -  SW trace, SW dump, HW trace, HW dump
>> > - Reset - Surgical correction (e.g. modify Q, flush Q, reset of device, etc)
>> > Actions can be performed by SW or HW.
>> > 
>> > User is allowed to enable or disable condition checkers and its action mapping.
>> > 
>> > This RFC man page patch describes the suggested API of devlink-exception in order
>> > to control conditions and actions.
>> > 
>> > V2:
>> > * Renaming terms:
>> > 	health -> exception
>> > 	sensor -> condition
>> > * Remove reinit command and merge with action command.
>> > * Consmetics in grammer.
>> > 
>> > Eran Ben Elisha (1):
>> >   man: Add devlink exception man page
>> > 
>> > man/man8/devlink-exception.8 | 158 +++++++++++++++++++++++++++++++++++++++++++
>> > 1 file changed, 158 insertions(+)
>> > create mode 100644 man/man8/devlink-exception.8
>> > 
>> > -- 
>> > 1.8.3.1
>> >