From: Jakub Kicinski <kuba@kernel.org>
To: Pavan Chebbi <pavan.chebbi@broadcom.com>
Cc: Vadim Fedorenko <vadim.fedorenko@linux.dev>,
Jiri Pirko <jiri@resnulli.us>,
Michael Chan <michael.chan@broadcom.com>,
davem@davemloft.net, netdev@vger.kernel.org, edumazet@google.com,
pabeni@redhat.com, andrew.gospodarek@broadcom.com,
richardcochran@gmail.com
Subject: Re: [PATCH net-next 1/2] bnxt_en: Introduce devlink runtime driver param to set ptp tx timeout
Date: Wed, 6 Mar 2024 20:19:13 -0800 [thread overview]
Message-ID: <20240306201913.626a41f0@kernel.org> (raw)
In-Reply-To: <CALs4sv123NSvtprMEqTxhHVjS6i1ZDgfOrx4z_cEnUyYuQP1Zg@mail.gmail.com>
On Thu, 7 Mar 2024 09:20:44 +0530 Pavan Chebbi wrote:
> > > As such timeouts are rare but still normal.
> >
> > Normal, because...? Why do they happen?
>
> Excuse me for the late reply.
> In my experience so far, it's primarily because of flow control and
> how stressed the underlying HW queue is. (I am sure it's not unique to
> our hardware alone)
> Hence we wanted to accommodate cases where the expected wait time is
> higher than what is default in the driver, for the packets to go out.
> But it's disappointing to know that even private devlink params are
> discouraged for such purposes.
> I'd think that non-generic driver params in devlink serve exactly such
> requirements and having such a knob would be useful for an advanced
> user.
> Not to mention, in my view, such additions to devlink would make it
> more popular and would help in its wider adoption.
The problem can be solved more intelligently.
next prev parent reply other threads:[~2024-03-07 4:19 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-29 7:02 [PATCH net-next 0/2] bnxt_en: Support configurable PTP TX timeout Michael Chan
2024-02-29 7:02 ` [PATCH net-next 1/2] bnxt_en: Introduce devlink runtime driver param to set ptp tx timeout Michael Chan
2024-02-29 9:27 ` Vadim Fedorenko
2024-02-29 17:11 ` Jiri Pirko
2024-02-29 17:30 ` Jakub Kicinski
2024-02-29 21:22 ` Vadim Fedorenko
2024-03-01 1:49 ` Jakub Kicinski
2024-03-01 7:39 ` Pavan Chebbi
2024-03-01 17:18 ` Jakub Kicinski
2024-03-07 3:50 ` Pavan Chebbi
2024-03-07 4:19 ` Jakub Kicinski [this message]
2024-03-01 11:34 ` Jiri Pirko
2024-02-29 7:02 ` [PATCH net-next 2/2] bnxt_en: Retry for TX timestamp from FW until timeout specified Michael Chan
2024-02-29 9:23 ` Vadim Fedorenko
2024-02-29 16:43 ` Michael Chan
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20240306201913.626a41f0@kernel.org \
--to=kuba@kernel.org \
--cc=andrew.gospodarek@broadcom.com \
--cc=davem@davemloft.net \
--cc=edumazet@google.com \
--cc=jiri@resnulli.us \
--cc=michael.chan@broadcom.com \
--cc=netdev@vger.kernel.org \
--cc=pabeni@redhat.com \
--cc=pavan.chebbi@broadcom.com \
--cc=richardcochran@gmail.com \
--cc=vadim.fedorenko@linux.dev \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).