From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Paul E. McKenney" Subject: Re: [PATCH v2] kvm/x86: Inform RCU of quiescent state when entering guest mode Date: Wed, 11 Jul 2018 14:09:10 -0700 Message-ID: <20180711210910.GE3593@linux.vnet.ibm.com> References: <20180711174843.GX3593@linux.vnet.ibm.com> <20180711180101.3711464-1-dwmw2@infradead.org> <20180711182053.GA3593@linux.vnet.ibm.com> <20180711183645.GA23820@linux.vnet.ibm.com> <62e945ee-a58e-f9b3-279c-74cd0f5809da@de.ibm.com> <20180711202752.GC3593@linux.vnet.ibm.com> <1531342492.8759.90.camel@infradead.org> Reply-To: paulmck@linux.vnet.ibm.com Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Cc: Christian Borntraeger , peterz@infradead.org, mhillenb@amazon.de, linux-kernel@vger.kernel.org, kvm@vger.kernel.org To: David Woodhouse Return-path: Content-Disposition: inline In-Reply-To: <1531342492.8759.90.camel@infradead.org> Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org On Wed, Jul 11, 2018 at 09:54:52PM +0100, David Woodhouse wrote: > On Wed, 2018-07-11 at 13:27 -0700, Paul E. McKenney wrote: > > > > Something like this, on top of the earlier patch?  I am not at all > > confident of this patch because there might be other entry/exit > > paths I am missing.  Plus there might be RCU uses on the arch- > > specific patch to and from the guest OS. > > That was going to be my starting point, yes. With some additional > manual review and testing to cover the "not at all confident" part. :) Please feel free to change as needed, up to and including throwing my patch away and starting over. ;-) Thanx, Paul