linux-kernel - Re: [PATCH v2] kvm/x86: Inform RCU of quiescent state when entering guest mode

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Message-Id: <20180711210910.GE3593@linux.vnet.ibm.com>
Date:   Wed, 11 Jul 2018 14:09:10 -0700
From:   "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:     David Woodhouse <dwmw2@...radead.org>
Cc:     Christian Borntraeger <borntraeger@...ibm.com>,
        peterz@...radead.org, mhillenb@...zon.de,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Subject: Re: [PATCH v2] kvm/x86: Inform RCU of quiescent state when entering
 guest mode

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