netdev - Re: [patch net-next 00/10] Add support for resource abstraction

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Date:   Wed, 20 Dec 2017 21:03:10 +0100
From:   Jiri Pirko <jiri@...nulli.us>
To:     David Ahern <dsa@...ulusnetworks.com>
Cc:     netdev@...r.kernel.org, davem@...emloft.net, arkadis@...lanox.com,
        mlxsw@...lanox.com, andrew@...n.ch,
        vivien.didelot@...oirfairelinux.com, f.fainelli@...il.com,
        michael.chan@...adcom.com, ganeshgr@...lsio.com,
        saeedm@...lanox.com, matanb@...lanox.com, leonro@...lanox.com,
        idosch@...lanox.com, jakub.kicinski@...ronome.com, ast@...nel.org,
        daniel@...earbox.net, simon.horman@...ronome.com,
        pieter.jansenvanvuuren@...ronome.com, john.hurley@...ronome.com,
        alexander.h.duyck@...el.com, linville@...driver.com,
        gospo@...adcom.com, steven.lin1@...adcom.com, yuvalm@...lanox.com,
        ogerlitz@...lanox.com, roopa@...ulusnetworks.com
Subject: Re: [patch net-next 00/10] Add support for resource abstraction

Wed, Dec 20, 2017 at 08:23:54PM CET, dsa@...ulusnetworks.com wrote:
>On 12/20/17 4:58 AM, Jiri Pirko wrote:
>> From: Jiri Pirko <jiri@...lanox.com>
>> 
>> Many of the ASIC's internal resources are limited and are shared between
>> several hardware procedures. For example, unified hash-based memory can
>> be used for many lookup purposes, like FDB and LPM. In many cases the user
>> can provide a partitioning scheme for such a resource in order to perform
>> fine tuning for his application. In such cases performing driver reload is
>> needed for the changes to take place, thus this patchset also adds support
>> for hot reload.
>> 
>> Such an abstraction can be coupled with devlink's dpipe interface, which
>> models the ASIC's pipeline as a graph of match/action tables. By modeling
>> the hardware resource object, and by coupling it to several dpipe tables,
>> further visibility can be achieved in order to debug ASIC-wide issues.
>> 
>> The proposed interface will provide the user the ability to understand the
>> limitations of the hardware, and receive notification regarding its occupancy.
>> Furthermore, monitoring the resource occupancy can be done in real-time and
>> can be useful in many cases.
>> ---
>> Userspace part prototype can be found at https://github.com/arkadis/iproute2/
>> at resource_dev branch.
>> 
>
>The breakout problem I mentioned in the last round of patches has not
>been fixed:

Oops, I guess that we missed that. Thanks!