Date: Sat, 11 Nov 2017 20:30:50 -0800 From: "K. Macy" <kmacy@freebsd.org> To: Vincenzo Maffione <v.maffione@gmail.com> Cc: "Joseph H. Buehler" <jhpb@cox.net>, "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: Re: netmap scatter/gather? Message-ID: <CAHM0Q_OUd=q3EwLHQ_g-h=%2B-xghNUGbxO0mzAWiBa0Ph3bWpaA@mail.gmail.com> In-Reply-To: <CA%2B_eA9hEiw9cWR5e_JtRGpG70woS5KxJpyCo0P4fu2Q6T9BibA@mail.gmail.com> References: <5A01ED27.60900@cox.net> <CA%2B_eA9hEiw9cWR5e_JtRGpG70woS5KxJpyCo0P4fu2Q6T9BibA@mail.gmail.com>
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On Tue, Nov 7, 2017 at 9:32 AM, Vincenzo Maffione <v.maffione@gmail.com> wrote: > Hi, > In general netmap adapters (i.e. netmap ports) may support NS_MOREFRAG. > But in practice this is mainly supported on VALE ports. > So if you don't want to add the missing support by yourself you can simply > change the netmap buffer size by tuning the sysctl dev.netmap.buf_size, and > increase it to 9600. > When doing vxlan that allows me to avoid copies on encap, but I don't see any mechanism to avoid a (second) copy on decap where what I'd like to do is to indicate to VALE that the packet starts at a certain offset. Am I missing something? Thanks.
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