[PATCH] net/af_xdp: allow using copy mode in XSK

[Li, Xiaoyun]

Hi

> -----Original Message-----
> From: Zhang, Qi Z <qi.z.zhang at intel.com>
> Sent: Tuesday, June 14, 2022 00:38
> To: Li, Xiaoyun <xiaoyun.li at intel.com>; Loftus, Ciara
> <ciara.loftus at intel.com>; dev at dpdk.org
> Subject: RE: [PATCH] net/af_xdp: allow using copy mode in XSK
> 
> 
> 
> > -----Original Message-----
> > From: Li, Xiaoyun <xiaoyun.li at intel.com>
> > Sent: Monday, June 13, 2022 11:13 PM
> > To: Loftus, Ciara <ciara.loftus at intel.com>; Zhang, Qi Z
> > <qi.z.zhang at intel.com>; dev at dpdk.org
> > Cc: Li, Xiaoyun <xiaoyun.li at intel.com>
> > Subject: [PATCH] net/af_xdp: allow using copy mode in XSK
> >
> > DPDK assumes that users only want AF_XDP socket (XSK) into zero copy
> > mode when the kernel supports it. However, sometimes kernel driver
> > doesn't support it well and copy mode is more stable and preferred.
> 
> rename "no_zerocopy" to "force_copy" looks better?
> 
> This aligned with the comment on the macro definition in kernel
> 
> #define XDP_COPY        (1 << 1) /* Force copy-mode */
> 
> And also make the below code more smooth.
> 
> 	if (internals->force_copy)
> 		cfg.bind_flags |= XDP_COPY;

Sounds good. Thanks. Will do in the next version.
> 
>