From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paolo Bonzini Subject: Re: User question: does KVM work better with latest Linux kernel? Date: Thu, 17 Mar 2016 14:32:52 +0100 Message-ID: <56EAB204.1040102@redhat.com> References: <20160317131014.7dc42d4f@fujitsu> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit To: Aleksander Alekseev , KVM devel mailing list Return-path: Received: from mail-wm0-f51.google.com ([74.125.82.51]:35144 "EHLO mail-wm0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030618AbcCQNc4 (ORCPT ); Thu, 17 Mar 2016 09:32:56 -0400 Received: by mail-wm0-f51.google.com with SMTP id l68so226478765wml.0 for ; Thu, 17 Mar 2016 06:32:55 -0700 (PDT) In-Reply-To: <20160317131014.7dc42d4f@fujitsu> Sender: kvm-owner@vger.kernel.org List-ID: On 17/03/2016 11:10, Aleksander Alekseev wrote: > 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. None of the bugs sound like something that would be fixed (in fact they might even be FreeBSD bugs). However, upgrading to a recent kernel is generally a good thing to do before reporting a bug. Paolo