netdev - Re: [PATCH] net-xdp: netdev attribute to control xdpgeneric skb linearization

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Message-ID: <875zh2bis0.fsf@toke.dk>
Date:   Thu, 23 Jan 2020 10:53:51 +0100
From:   Toke Høiland-Jørgensen <toke@...hat.com>
To:     Luigi Rizzo <lrizzo@...gle.com>, netdev@...r.kernel.org
Cc:     Jesper Dangaard Brouer <hawk@...nel.org>,
        "David S. Miller" <davem@...emloft.net>, sameehj@...zon.com,
        Luigi Rizzo <lrizzo@...gle.com>
Subject: Re: [PATCH] net-xdp: netdev attribute to control xdpgeneric skb linearization

Luigi Rizzo <lrizzo@...gle.com> writes:

> Add a netdevice flag to control skb linearization in generic xdp mode.
> Among the various mechanism to control the flag, the sysfs
> interface seems sufficiently simple and self-contained.
> The attribute can be modified through
> 	/sys/class/net/<DEVICE>/xdp_linearize
> The default is 1 (on)

Erm, won't turning off linearization break the XDP program's ability to
do direct packet access?

-Toke