From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-ID: <5444DC3F.20601@nod.at> Date: Mon, 20 Oct 2014 11:56:15 +0200 From: Richard Weinberger MIME-Version: 1.0 References: In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Subject: Re: [uml-devel] [UM] Long loop in __getnsdayoftime() after resume from ram To: Thomas Meyer Cc: user-mode-linux-devel , Linux Kernel Mailing List List-ID: Am 20.10.2014 um 11:51 schrieb Thomas Meyer: >> Hmm, does this always happen? > > Yes, my single core system seems to trigger this every time after resume from ram. What is your host kernel? >> At least on my notebook it did not happen. I've started an UML yesterday >> suspended it and after more than 12h it worked fine today. >> >> BTW: Do you see the issue also then freezing UML using the freezer cgroup? > > I'm not sure what do you mean by this. Do I need to enable some special configs for this in the host or uml kernel? Create on the host side a new freezer cgroup, put UML into it and freeze/thaw it. i.e. mkdir /sys/fs/cgroup/freezer/uml ; echo > /sys/fs/cgroup/freezer/uml/tasks. In the said shell run UML and then freeze it using echo FROZEN > /sys/fs/cgroup/freezer/uml/freezer.state. Later thaw it: echo THAWED > /sys/fs/cgroup/freezer/uml/freezer.state Thanks, //richard