netdev - Re: [iproute2-next v3] devlink: display elapsed time during flash update

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Message-ID: <20201020064519.GD11282@nanopsycho.orion>
Date:   Tue, 20 Oct 2020 08:45:19 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     "Keller, Jacob E" <jacob.e.keller@...el.com>
Cc:     David Ahern <dsahern@...il.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Jakub Kicinski <kuba@...nel.org>,
        Shannon Nelson <snelson@...sando.io>
Subject: Re: [iproute2-next v3] devlink: display elapsed time during flash
 update

Mon, Oct 19, 2020 at 09:05:34PM CEST, jacob.e.keller@...el.com wrote:
>> -----Original Message-----
>> From: David Ahern <dsahern@...il.com>
>> Sent: Saturday, October 17, 2020 8:35 AM
>> To: Keller, Jacob E <jacob.e.keller@...el.com>; netdev@...r.kernel.org; Jiri Pirko
>> <jiri@...nulli.us>
>> Cc: Shannon Nelson <snelson@...sando.io>
>> Subject: Re: [iproute2-next v3] devlink: display elapsed time during flash update
>> 
>> On 10/14/20 4:31 PM, Jacob Keller wrote:
>> > For some devices, updating the flash can take significant time during
>> > operations where no status can meaningfully be reported. This can be
>> > somewhat confusing to a user who sees devlink appear to hang on the
>> > terminal waiting for the device to update.
>> >
>> > Recent changes to the kernel interface allow such long running commands
>> > to provide a timeout value indicating some upper bound on how long the
>> > relevant action could take.
>> >
>> > Provide a ticking counter of the time elapsed since the previous status
>> > message in order to make it clear that the program is not simply stuck.
>> >
>> > Display this message whenever the status message from the kernel
>> > indicates a timeout value. Additionally also display the message if
>> > we've received no status for more than couple of seconds. If we elapse
>> > more than the timeout provided by the status message, replace the
>> > timeout display with "timeout reached".
>> >
>> > Signed-off-by: Jacob Keller <jacob.e.keller@...el.com>
>> > ---
>> > Changes since v2
>> > * use clock_gettime on CLOCK_MONOTONIC instead of gettimeofday
>> > * remove use of timersub since we're now using struct timespec
>> >
>> >  devlink/devlink.c | 105 +++++++++++++++++++++++++++++++++++++++++++++-
>> >  1 file changed, 104 insertions(+), 1 deletion(-)
>> >
>> 
>> applied to iproute2-next.
>> 
>> The DEVLINK attributes are ridiculously long --
>> DEVLINK_ATTR_FLASH_UPDATE_STATUS_TIMEOUT is 40 characters -- which
>> forces really long code lines or oddly wrapped lines. Going forward
>> please consider abbreviations on name components to reduce their lengths.
>
>This is probably a larger discussion, since basically every devlink attribute name is long.
>
>Jiri, Jakub, any thoughts on this? I'd like to see whatever abbreviation scheme we use be consistent.

I prefer long and easy to understand.


>
>Thanks,
>Jake