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Date: Mon, 20 Oct 2014 11:56:15 +0200 From: Richard Weinberger <richard@....at> To: Thomas Meyer <thomas@...3r.de> CC: user-mode-linux-devel <user-mode-linux-devel@...ts.sourceforge.net>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: [uml-devel] [UM] Long loop in __getnsdayoftime() after resume from ram 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 <pid of a shell> > /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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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