Re: [PATCH v4 net-next 2/9] i40e: respect metadata on XSK Rx to skb

[Alexander Lobakin]

From: Tony Nguyen <anthony.l.nguyen@xxxxxxxxx>
Date: Thu, 9 Dec 2021 18:50:07 +0000

> On Thu, 2021-12-09 at 18:38 +0100, Alexander Lobakin wrote:
> > From: Jesper Dangaard Brouer <jbrouer@xxxxxxxxxx>
> > Date: Thu, 9 Dec 2021 09:27:37 +0100
> > 
> > > On 08/12/2021 15.06, Alexander Lobakin wrote:
> > > > For now, if the XDP prog returns XDP_PASS on XSK, the metadata
> > > > will
> > > > be lost as it doesn't get copied to the skb.
> > > 
> > > I have an urge to add a newline here, when reading this, as IMHO it
> > > is a 
> > > paragraph with the problem statement.
> > > 
> > > > Copy it along with the frame headers. Account its size on skb
> > > > allocation, and when copying just treat it as a part of the frame
> > > > and do a pull after to "move" it to the "reserved" zone.
> > > 
> > > Also newline here, as next paragraph are some extra details, you
> > > felt a 
> > > need to explain to the reader.
> > > 
> > > > net_prefetch() xdp->data_meta and align the copy size to speed-up
> > > > memcpy() a little and better match i40e_costruct_skb().
> > >                                       ^^^^^^xx^^^^^^^^^
> > > 
> > > commit messages.
> > 
> > Oh gosh, I thought I don't have attention deficit. Thanks, maybe
> > Tony will fix it for me or I could send a follow-up (or resend if
> > needed, I saw those were already applied to dev-queue).
> 
> If there's no need for follow-ups beyond this change, I'll fix it up.

The rest is fine, thank you!

> Thanks,
> Tony
> 
> > > --Jesper
> > 
> > Al

Al