From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ingo Molnar Subject: Re: [PATCH 4/5] watchdog: control hard lockup detection default Date: Mon, 18 Aug 2014 11:16:44 +0200 Message-ID: <20140818091644.GE25495@gmail.com> References: <1407768567-171794-1-git-send-email-dzickus@redhat.com> <1407768567-171794-5-git-send-email-dzickus@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: akpm@linux-foundation.org, kvm@vger.kernel.org, pbonzini@redhat.com, mingo@redhat.com, LKML , Ulrich Obergfell , Andrew Jones To: Don Zickus Return-path: Received: from mail-wi0-f175.google.com ([209.85.212.175]:52909 "EHLO mail-wi0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750906AbaHRJQt (ORCPT ); Mon, 18 Aug 2014 05:16:49 -0400 Content-Disposition: inline In-Reply-To: <1407768567-171794-5-git-send-email-dzickus@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: * Don Zickus wrote: > The running kernel still has the ability to enable/disable at any > time with /proc/sys/kernel/nmi_watchdog us usual. However even > when the default has been overridden /proc/sys/kernel/nmi_watchdog > will initially show '1'. To truly turn it on one must disable/enable > it, i.e. > echo 0 > /proc/sys/kernel/nmi_watchdog > echo 1 > /proc/sys/kernel/nmi_watchdog This looks like a bug, why is this so? Thanks, Ingo