netdev - Re: [patch net-next v2 00/10] Add support for resource abstraction

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Date:   Thu, 28 Dec 2017 17:43:58 +0100
From:   Jiri Pirko <jiri@...nulli.us>
To:     David Ahern <dsa@...ulusnetworks.com>
Cc:     Yuval Mintz <yuvalm@...lanox.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        Arkadi Sharshevsky <arkadis@...lanox.com>,
        mlxsw <mlxsw@...lanox.com>, "andrew@...n.ch" <andrew@...n.ch>,
        "vivien.didelot@...oirfairelinux.com" 
        <vivien.didelot@...oirfairelinux.com>,
        "f.fainelli@...il.com" <f.fainelli@...il.com>,
        "michael.chan@...adcom.com" <michael.chan@...adcom.com>,
        "ganeshgr@...lsio.com" <ganeshgr@...lsio.com>,
        Saeed Mahameed <saeedm@...lanox.com>,
        Matan Barak <matanb@...lanox.com>,
        Leon Romanovsky <leonro@...lanox.com>,
        Ido Schimmel <idosch@...lanox.com>,
        "jakub.kicinski@...ronome.com" <jakub.kicinski@...ronome.com>,
        "ast@...nel.org" <ast@...nel.org>,
        "daniel@...earbox.net" <daniel@...earbox.net>,
        "simon.horman@...ronome.com" <simon.horman@...ronome.com>,
        "pieter.jansenvanvuuren@...ronome.com" 
        <pieter.jansenvanvuuren@...ronome.com>,
        "john.hurley@...ronome.com" <john.hurley@...ronome.com>,
        "alexander.h.duyck@...el.com" <alexander.h.duyck@...el.com>,
        "linville@...driver.com" <linville@...driver.com>,
        "gospo@...adcom.com" <gospo@...adcom.com>,
        "steven.lin1@...adcom.com" <steven.lin1@...adcom.com>,
        Or Gerlitz <ogerlitz@...lanox.com>,
        "roopa@...ulusnetworks.com" <roopa@...ulusnetworks.com>,
        Shrijeet Mukherjee <shm@...ulusnetworks.com>
Subject: Re: [patch net-next v2 00/10] Add support for resource abstraction

Thu, Dec 28, 2017 at 05:33:58PM CET, dsa@...ulusnetworks.com wrote:
>On 12/28/17 10:23 AM, Jiri Pirko wrote:
>>> So there are 4 tables exported to userspace:
>>>
>>> 1. mlxsw_erif table which is not in any of the kvd regions (no resource
>>> path is given) and it has a size of 1000. Does mlxsw_erif mean a rif as
>>> in Router Interfaces? So the switch supports up to 1000 router interfaces.
>>>
>>> 2. mlxsw_host4 in /kvd/hash_single with a size of 62. Based on the
>> Size tells you the actual size. It cannot give you max size. The reason
>> is simple. The resources are shared among multiple tables. That is
>> exactly what this resource patch makes visible.
>> 
>> 
>
>In the erif table, the 1000 is the max not current usage. I do not have

I believe that is a bug in erif dpipe implementation
(mlxsw_sp_dpipe_table_erif_size_get) We'll fix that. Thanks!



>1000 interfaces:
>
>$ ip -br li sh | wc -l
>597
>
>
>$ devlink dpipe table dump pci/0000:03:00.0 name mlxsw_erif
>...
>  index 503
>  match_value:
>    type field_exact header mlxsw_meta field erif_port mapping ifindex
>mapping_value 601 value 503
>  action_value:
>    type field_modify header mlxsw_meta field l3_forward value 1
>
>
>The host4 table it is current size with no maximum.
>
>The meaning of table size needs to be consistent across tables.