netdev - Re: RMNET QMAP data aggregation with size greater than 16384

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Date:   Fri, 3 Sep 2021 15:55:00 +0200
From:   Daniele Palmas <dnlplm@...il.com>
To:     Bjørn Mork <bjorn@...k.no>
Cc:     Subash Abhinov Kasiviswanathan <subashab@...eaurora.org>,
        Aleksander Morgado <aleksander@...ksander.es>,
        Network Development <netdev@...r.kernel.org>,
        Sean Tranchetti <stranche@...eaurora.org>
Subject: Re: RMNET QMAP data aggregation with size greater than 16384

Hi all,

Il giorno ven 13 ago 2021 alle ore 08:25 Bjørn Mork <bjorn@...k.no> ha scritto:
>
> subashab@...eaurora.org writes:
>
> >> Just an heads-up that when I proposed that urb size there were doubts
> >> about the value (see
> >> https://patchwork.ozlabs.org/project/netdev/patch/20200909091302.20992-1-dnlplm@gmail.com/#2523774
> >> and
> >> https://patchwork.ozlabs.org/project/netdev/patch/20200909091302.20992-1-dnlplm@gmail.com/#2523958):
> >> it is true that this time you are setting the size just when qmap is
> >> enabled, but I think that Carl's comment about low-cat chipsets could
> >> still apply.
> >> Thanks,
> >> Daniele
> >>
> >
> > Thanks for bringing this up.
> >
> > Looks like a tunable would be needed to satisfy all users.
> > Perhaps we can use 32k as default in mux and passthrough mode but
> > allow for changes
> > there if needed through a sysfs.
>
> Sounds reasonable to me.
>

I have done a bit of testing both with qmi_wwann qmap implementation
and rmnet, so far everything seems to be working fine.

Thanks,
Daniele

>
>
> Bjørn