From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marcelo Tosatti Subject: Re: [PATCH 0/4 V13] Avoid soft lockup message when KVM is stopped by host Date: Tue, 14 Feb 2012 13:38:36 -0200 Message-ID: <20120214153836.GA21106@amt.cnet> References: <1328713666-11424-1-git-send-email-emunson@mgebm.net> <20120214152931.GA6881@mgebm.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: avi@redhat.com, mingo@redhat.com, hpa@zytor.com, ryanh@linux.vnet.ibm.com, aliguori@us.ibm.com, kvm@vger.kernel.org, linux-arch@vger.kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org To: Eric B Munson Return-path: Content-Disposition: inline In-Reply-To: <20120214152931.GA6881@mgebm.net> Sender: linux-arch-owner@vger.kernel.org List-Id: kvm.vger.kernel.org On Tue, Feb 14, 2012 at 10:29:31AM -0500, Eric B Munson wrote: > On Wed, 08 Feb 2012, Eric B Munson wrote: > > > > > When a guest kernel is stopped by the host hypervisor it can look like a soft > > lockup to the guest kernel. This false warning can mask later soft lockup > > warnings which may be real. This patch series adds a method for a host > > hypervisor to communicate to a guest kernel that it is being stopped. The > > final patch in the series has the watchdog check this flag when it goes to > > issue a soft lockup warning and skip the warning if the guest knows it was > > stopped. > > > > It was attempted to solve this in Qemu, but the side effects of saving and > > restoring the clock and tsc for each vcpu put the wall clock of the guest behind > > by the amount of time of the pause. This forces a guest to have ntp running > > in order to keep the wall clock accurate. > > Avi, > > Is this set fit for merging or is there something else you want changed? Eric, On Message-ID: <20120210160536.GA23363@amt.cnet>, i asked: How is the stub getting included for other architectures again?