Re: [PATCH net-next v2] net: core: Expose number of link up/down transitions

[Florian Fainelli]

On 01/22/2018 12:43 PM, David Miller wrote:
> From: Florian Fainelli <f.fainelli@xxxxxxxxx>
> Date: Thu, 18 Jan 2018 09:59:13 -0800
> 
>> From: David Decotigny <decot@xxxxxxxxxxxx>
>>
>> Expose the number of times the link has been going UP or DOWN, and
>> update the "carrier_changes" counter to be the sum of these two events.
>> While at it, also update the sysfs-class-net documentation to cover:
>> carrier_changes (3.15), carrier_up_count (4.16) and carrier_down_count
>> (4.16)
>>
>> Signed-off-by: David Decotigny <decot@xxxxxxxxxxxx>
>> [Florian:
>> * rebase
>> * add documentation
>> * merge carrier_changes with up/down counters]
>> Signed-off-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
>> ---
>> Changes in v2:
>> - fixed sysfs attributes to use <iface>
>> - renamed count_link_{up,down} to carrier_{up,down}_count to match
>>   existing carrier_changes semantics
> 
> Like David Ahern I am strongly against the proliferation of sysfs files
> attached to network devices and the per-netdevice costs associated with
> that.
> 
> However, dealing with that is a longer term issue that nobody has a clear
> plan for.  Therefore I cannot reject this change on that basis alone.
> 
> The information is useful, so applied, thanks.

Thanks! David A, do you have any plans to revive your LWD/LWT devices
patches, AFAIR you were allowing a knob disabling the creation of sysfs
attributes.
-- 
Florian