> -----Original Message----- > From: Richardson, Bruce > Sent: Monday, January 5, 2015 6:38 PM > To: Ouyang, Changchun > Cc: Vlad Zolotarov; dev at dpdk.org > Subject: Re: [dpdk-dev] [PATCH v3 0/6] Enable VF RSS for Niantic > > On Thu, Dec 25, 2014 at 01:46:54AM +0000, Ouyang, Changchun wrote: > > Hi, > > > > > -----Original Message----- > > > From: Vlad Zolotarov [mailto:vladz at cloudius-systems.com] > > > Sent: Wednesday, December 24, 2014 5:59 PM > > > To: Ouyang, Changchun; dev at dpdk.org > > > Subject: Re: [dpdk-dev] [PATCH v3 0/6] Enable VF RSS for Niantic > > > > > > > > On the contrary - it's a very good idea! We use DPDK on Amazon's > > > guests with enhanced networking and we have no access to the PF. We > > > still need to know the RSS redirection rules for our VF pool. From > > > the 82599 spec, chapter > > > 4.6.10.1.1: "redirection table is common to all the pools and only > > > indicates the queue inside the pool to use once the pool is chosen". > > > In that case we need to get the whole 128 entries of the RETA. Is > > > there a reason why we can't have it? > > > > > Due to hardware limitation, VF could not query its own reta table, > > because there is not its own reta, The reta table shared by pf and all vfs. > > If you need know it, query them on pf is feasible way to do it. > > > It's not feasible if you only have access to a guest. :-) IMHO since the > guest is > seeing the results of the RSS redirection table, it should be able to query > the > table, if it wants. It should not, however, be able to modify the table, as > it is > owned by the PF.
Understand the situation, but the real issue is that the guest has no way to know the rss redirection table, so it could not query it.
