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From: Jeroen Hofstee <jhofstee@victronenergy.com>
To: "linux-can@vger.kernel.org" <linux-can@vger.kernel.org>
Subject: rx-dropped increases if the can module is not loaded (yet)
Date: Fri, 27 Nov 2020 17:09:40 +0100	[thread overview]
Message-ID: <269cc265-272e-6b57-0f95-90a3bd66aea3@victronenergy.com> (raw)

Hi,

Since it took me a while to figure it out, it might be worthwhile to share.
If a CAN-bus network interface is first set to up and only later used,
the messages received in the meantime are counted by [1] as dropped.

If the the can module is modprobed before the interface is upped, this
is no longer the case.

Perhaps it saves someone some time.

Jeroen

[1] https://github.com/torvalds/linux/blob/v5.9/net/core/dev.c#L5257


             reply	other threads:[~2020-11-27 16:10 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-27 16:09 Jeroen Hofstee [this message]
2020-11-28 17:44 ` rx-dropped increases if the can module is not loaded (yet) Oliver Hartkopp
2020-12-02 15:47   ` Jeroen Hofstee
2020-12-02 16:24     ` Oliver Hartkopp

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