From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ud10.udmedia.de ([194.117.254.50]:48674 "EHLO mail.ud10.udmedia.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754977AbdEKM5d (ORCPT ); Thu, 11 May 2017 08:57:33 -0400 Date: Thu, 11 May 2017 14:57:24 +0200 From: Markus Trippelsdorf To: linux-block@vger.kernel.org Cc: Omar Sandoval Subject: Kyber scheduler brings system to halt when used on swap partition Message-ID: <20170511125724.GA302@x4> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-block-owner@vger.kernel.org List-Id: linux-block@vger.kernel.org Using the new Kyber mq scheduler brings my system to a halt as soon as it starts swapping. The swap partition resides on an SSD and is the only partition in use on that drive. Symptoms are stuttering sound and non moving mouse pointer. After a while the monitor switches off, because it gets no signal anymore. At which point only a hard reset will bring the system back. "none" works fine. -- Markus