From mboxrd@z Thu Jan 1 00:00:00 1970 From: Aleksander Alekseev Subject: User question: does KVM work better with latest Linux kernel? Date: Thu, 17 Mar 2016 13:10:14 +0300 Message-ID: <20160317131014.7dc42d4f@fujitsu> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit To: KVM devel mailing list Return-path: Received: from relay15.nicmail.ru ([195.208.5.161]:47811 "EHLO relay15.nicmail.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933159AbcCQKKd (ORCPT ); Thu, 17 Mar 2016 06:10:33 -0400 Received: from [109.70.25.226] (port=36137 helo=fujitsu) by f19.mail.nic.ru with esmtp (Exim 5.55) (envelope-from ) id 1agUsx-0002NN-Be for kvm@vger.kernel.org; Thu, 17 Mar 2016 13:10:31 +0300 Received: from [93.174.131.138] (account afiskon@devzen.ru HELO fujitsu) by proxy04.mail.nic.ru (Exim 5.55) with id 1agUsx-0003QF-Dd for kvm@vger.kernel.org; Thu, 17 Mar 2016 13:10:31 +0300 Sender: kvm-owner@vger.kernel.org List-ID: Hello I'm currently using Linux kernel 3.13.0 (Ubuntu Linux 14.04 with latest updates). KVM works in general but I noticed a number of small bugs. E.g. after suspending/resuming a system time is different on host and guest systems (FreeBSD 10.2). Also when guest system consumes 100% of its CPU, htop on host system shows that utilization is 100%, but in guest system it shows only about 33%. Etc. Is it worth trying to upgrade Linux kernel to say 4.5? Does an upgrade usually solve some problems with KVM or more likely I will just waste my time? So basically I'm asking what is considered rule of thumb here. -- Best regards, Aleksander Alekseev http://eax.me/