On Fri, Feb 03, 2017 at 10:15:30AM -0500, David Miller wrote: > From: Corentin Labbe <clabbe.montj...@gmail.com> > Date: Fri, 3 Feb 2017 14:41:45 +0100 > > > On Tue, Jan 31, 2017 at 11:12:25PM -0500, David Miller wrote: > >> From: Corentin Labbe <clabbe.montj...@gmail.com> > >> Date: Tue, 31 Jan 2017 10:11:48 +0100 > >> > >> > The stmmac driver run TX completion under NAPI but without checking > >> > the work done by the TX completion function. > >> > >> The current behavior is correct and completely intentional. > >> > >> A driver should _never_ account TX work to the NAPI poll budget. > >> > >> This is because TX liberation is orders of magnitude cheaper than > >> receiving a packet, and such SKB freeing makes more SKBs available > >> for RX processing. > >> > >> Therefore, TX work should never count against the NAPI budget. > >> > >> Please do not fix something which is not broken. > > > > So at least the documentation I read must be fixed > > (https://wiki.linuxfoundation.org/networking/napi) > > We have no control over nor care about what the Linux Foundation writes > about the Linux networking code. > > Complain to them and please do not bother us about it. > > Thank you.
Sorry, this was not to bother you. Could you give me your opinion on the other question of the mail ? (just copied below) So perhaps the best way is to do like intel igb/ixgbe, keeping under NAPI until the stmmac_tx_clean function said that it finished handling the queue (with a distinct TX budget)? Thanks Regards
