From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from shards.monkeyblade.net ([184.105.139.130]:53752 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752260AbdKMOyV (ORCPT ); Mon, 13 Nov 2017 09:54:21 -0500 Date: Mon, 13 Nov 2017 23:54:14 +0900 (KST) Message-Id: <20171113.235414.987480304119622711.davem@davemloft.net> To: simon.guinot@sequanux.org Cc: thomas.petazzoni@free-electrons.com, netdev@vger.kernel.org, musv@gmx.de, andreas.tobler@cloudguard.ch, gregory.clement@free-electrons.com, antoine.tenart@free-electrons.com, mw@semihalf.com, stable@vger.kernel.org Subject: Re: [PATCH] net: mvneta: fix handling of the Tx descriptor counter From: David Miller In-Reply-To: <20171113145115.GM18407@kw.sim.vm.gnt> References: <20171108165835.13453-1-simon.guinot@sequanux.org> <20171111.184504.2151388779461931723.davem@davemloft.net> <20171113145115.GM18407@kw.sim.vm.gnt> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: stable-owner@vger.kernel.org List-ID: From: Simon Guinot Date: Mon, 13 Nov 2017 15:51:15 +0100 > IIUC the driver stops the queue if a threshold of 316 Tx descriptors is > reached (default and worst value). That's a lot of latency.