From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jean-Louis Dupond Subject: Backport - xen-netback: correctly schedule rate-limited queues Date: Tue, 11 Jul 2017 11:47:12 +0200 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit To: netdev@vger.kernel.org Return-path: Received: from apollo.dupie.be ([62.210.113.39]:56786 "EHLO apollo.dupie.be" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753081AbdGKJ47 (ORCPT ); Tue, 11 Jul 2017 05:56:59 -0400 Received: from localhost (localhost [127.0.0.1]) by apollo.dupie.be (Postfix) with ESMTP id 1DBA733C00FD for ; Tue, 11 Jul 2017 11:47:13 +0200 (CEST) Received: from apollo.dupie.be ([127.0.0.1]) by localhost (apollo.dupie.be [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id LjU4jKfu3LBu for ; Tue, 11 Jul 2017 11:47:12 +0200 (CEST) Received: from roundcube.dupie.be (localhost [IPv6:::1]) by apollo.dupie.be (Postfix) with ESMTPA id 4022133C00A1 for ; Tue, 11 Jul 2017 11:47:12 +0200 (CEST) Sender: netdev-owner@vger.kernel.org List-ID: Hi All, Is there a chance the following patch (https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/?id=dfa523ae9f2542bee4cddaea37b3be3e157f6e6b) can get backported to the current LTS kernels (including 4.9.x)? The commit message might not be completely showing the impact of this issue (which is fixed with the patch). Without the patch, ksoftirqd goes nuts if you upload on a domU with rate-limiting enabled. This not only causing high cpu load, but sometimes also a complete hang of the hypervisor. As the patch is quite important and trivial, I think it would be good to have it backported :) Thanks Jean-Louis