From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Monjalon Subject: Re: [PATCH] fix for jumbo frame issue with DPDK VF Date: Tue, 27 May 2014 16:53:22 +0200 Message-ID: <7982092.0LOTupiQtt@xps13> References: <1399386672-10480-1-git-send-email-konstantin.ananyev@intel.com> <536A307C.7050304@6wind.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7Bit Cc: dev-VfR2kkLFssw@public.gmane.org To: Konstantin Ananyev Return-path: In-Reply-To: <536A307C.7050304-pdR9zngts4EAvxtiuMwx3w@public.gmane.org> List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces-VfR2kkLFssw@public.gmane.org Sender: "dev" > > When latest Linux ixgbe PF is used, and DPDK VF is used in DPDK > > application, jumbo frames are not received. > > Also - if Linux ixgbe PF has MTU set to 1500 (default), > > then normal sized packets can be received by DPDK VF. > > However, if Linux PF has MTU > 1500, then DPDK VF receives no packets > > (normal or jumbo). > > With ixgbe_mbox_api_10 ixgbe simply didn't allow set VF MTU > 1514 for > > 82599. With ixgbe_mbox_ajpi_11 it does, though now, if PF uses jumbo > > frames, it simply disables RX for all VFs. > > So to work with PF ithat using jumbo frames, at startup each VF has to: > > 1. negotiate with PF mbox_api_11. > > 2. Send to PF SET_LPE message with desired MTU. > > Note, that if PF already uses MTU bigger then asked by the VF, > > then PF wouldn't take any action. > > > > Signed-off-by: Konstantin Ananyev > > Acked-by: Ivan Boule Applied for version 1.7.0. Thanks -- Thomas