From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ricardo Wurmus Subject: bug#27636: /dev/kvm went missing on i686, Linux 4.12 Date: Tue, 18 Jul 2017 22:09:36 +0200 Message-ID: <87shhtfqwv.fsf@elephly.net> References: <87y3rwetng.fsf@elephly.net> <87fue4gpzl.fsf@netris.org> <878tjmhlqm.fsf@elephly.net> <878tjlzf7l.fsf@netris.org> Mime-Version: 1.0 Content-Type: text/plain Return-path: Received: from eggs.gnu.org ([2001:4830:134:3::10]:51684) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dXYop-00042R-Kz for bug-guix@gnu.org; Tue, 18 Jul 2017 16:10:08 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dXYok-0008FV-Nn for bug-guix@gnu.org; Tue, 18 Jul 2017 16:10:07 -0400 Received: from debbugs.gnu.org ([208.118.235.43]:44276) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1dXYok-0008FM-KP for bug-guix@gnu.org; Tue, 18 Jul 2017 16:10:02 -0400 Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1dXYok-00076K-FL for bug-guix@gnu.org; Tue, 18 Jul 2017 16:10:02 -0400 Sender: "Debbugs-submit" Resent-Message-ID: In-reply-to: <878tjlzf7l.fsf@netris.org> List-Id: Bug reports for GNU Guix List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-guix-bounces+gcggb-bug-guix=m.gmane.org@gnu.org Sender: "bug-Guix" To: Mark H Weaver Cc: 27636@debbugs.gnu.org Mark H Weaver writes: > When you looked for "kvm" or "KVM", did your kernel message buffer still > include the initial boot messages? The kernel message buffer is of a > fixed size, so eventually the early messages are lost. I ran it immediately after booting 4.12. > I'm fairly sure that I've seen /dev/kvm on this machine in the past. It > might be that in earlier versions of Linux, /dev/kvm was created even > when it couldn't be used, and now it's created only conditionally, but > that's only a guess. I have seen it in the past as well. It is only with 4.12 that /dev/kvm is gone. I have installed 4.9 on this machine and /dev/kvm exists. -- Ricardo GPG: BCA6 89B6 3655 3801 C3C6 2150 197A 5888 235F ACAC https://elephly.net