Re: [dpdk-dev] [PATCH] librte_pmd_packet: add PMD for AF_PACKET-based virtual devices

[Thomas Monjalon <thomas.monjalon@6wind.com>]

2014-07-16 08:35, Neil Horman:
> On Tue, Jul 15, 2014 at 11:27:45PM +0200, Thomas Monjalon wrote:
> > 2014-07-14 09:46, John W. Linville:
> > > On Sat, Jul 12, 2014 at 12:34:46AM +0200, Thomas Monjalon wrote:
> > > > 2014-07-11 13:40, John W. Linville:
> > > > > Is there an example of code in DPDK that requires specific kernel
> > > > > versions?  What is the preferred method for coding such
> > > > > dependencies?
> > > > 
> > > > No there is no userspace code checking kernel version in DPDK.
> > > > Feel free to use what you think the best method.
> > > > Please keep in mind that checking version number is a maintenance
> > > > nightmare
> > > > because of backports (like RedHat do ;).
> 
> Actually, I feel the need to correct this (I know you're being humorous, but
> just the same).  You don't have a maintenence nightmare on your hands
> because RedHat backports kernel features, you have a nightmare maintenece
> situation on your hands because the DPDK uses kernel features that were
> never meant to be directly accessed outside of kernel space.
> Neil

You're right. Removing kernel modules from DPDK is a nice goal.
But here we were speaking about an userland library (AF_PACKET PMD) which rely 
on kernel features.

-- 
Thomas