From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: David Woodhouse <dwmw2@infradead.org>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>,
Peter Zijlstra <peterz@infradead.org>,
mhillenb@amazon.de, linux-kernel <linux-kernel@vger.kernel.org>,
kvm <kvm@vger.kernel.org>
Subject: Re: [RFC] Make need_resched() return true when rcu_urgent_qs requested
Date: Thu, 19 Jul 2018 10:09:53 -0700 [thread overview]
Message-ID: <20180719170953.GA17730@linux.vnet.ibm.com> (raw)
In-Reply-To: <20180718163712.GB12945@linux.vnet.ibm.com>
On Wed, Jul 18, 2018 at 09:37:12AM -0700, Paul E. McKenney wrote:
> On Wed, Jul 18, 2018 at 06:01:51PM +0200, David Woodhouse wrote:
> > On Wed, 2018-07-18 at 08:36 -0700, Paul E. McKenney wrote:
> > > And I finally did get some near misses from an earlier commit, so we
> > > should consider your patch to be officially off the hook.
> >
> > Yay, I like it when it's not my fault. I'll redo it with the ifdef
> > CONFIG_NO_HZ_FULL.
>
> Hey, I didn't say it wasn't your fault, only that it -officially- wasn't
> your fault. ;-)
And I believe that I found my bug in this commit (lots more testing still
required, but the preponderance of evidence and all that):
2cc0c7f07143 ("rcu: Eliminate ->rcu_qs_ctr from the rcu_dynticks structure")
So it really isn't your fault.
Of course, the real reason for the lack of fault on your part will not
because I believe I found the bug elsewhere, but instead because I will
be dropping your patch (and mine as well) on Frederic's advice. ;-)
Thanx, Paul
next prev parent reply other threads:[~2018-07-19 17:09 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20180709163432.GV3593@linux.vnet.ibm.com>
[not found] ` <1531162254.26547.3.camel@infradead.org>
[not found] ` <20180709203441.GE3593@linux.vnet.ibm.com>
[not found] ` <1531168538.26547.5.camel@infradead.org>
[not found] ` <20180709204248.GF3593@linux.vnet.ibm.com>
[not found] ` <1531169145.26547.8.camel@infradead.org>
[not found] ` <20180709210532.GH3593@linux.vnet.ibm.com>
[not found] ` <20180709220823.GA18045@linux.vnet.ibm.com>
[not found] ` <1531319025.8759.57.camel@infradead.org>
[not found] ` <20180711144303.GQ3593@linux.vnet.ibm.com>
[not found] ` <20180711164952.GA29994@linux.vnet.ibm.com>
2018-07-11 17:03 ` [RFC] Make need_resched() return true when rcu_urgent_qs requested David Woodhouse
2018-07-11 17:48 ` Paul E. McKenney
2018-07-11 18:01 ` [PATCH v2] kvm/x86: Inform RCU of quiescent state when entering guest mode David Woodhouse
2018-07-11 18:20 ` Paul E. McKenney
2018-07-11 18:36 ` Paul E. McKenney
2018-07-11 18:39 ` Christian Borntraeger
2018-07-11 20:27 ` Paul E. McKenney
2018-07-11 20:54 ` David Woodhouse
2018-07-11 21:09 ` Paul E. McKenney
2018-07-11 21:11 ` Christian Borntraeger
2018-07-11 21:32 ` Paul E. McKenney
2018-07-11 21:39 ` Christian Borntraeger
2018-07-11 23:47 ` Paul E. McKenney
2018-07-12 8:31 ` David Woodhouse
2018-07-12 11:00 ` Christian Borntraeger
2018-07-12 11:10 ` David Woodhouse
2018-07-12 11:58 ` Christian Borntraeger
2018-07-12 12:04 ` Christian Borntraeger
2018-07-11 23:37 ` Paul E. McKenney
2018-07-12 2:15 ` Paul E. McKenney
2018-07-12 6:21 ` Christian Borntraeger
2018-07-12 9:52 ` David Woodhouse
2018-07-11 18:31 ` [RFC] Make need_resched() return true when rcu_urgent_qs requested Christian Borntraeger
2018-07-11 20:17 ` Paul E. McKenney
2018-07-11 20:19 ` David Woodhouse
2018-07-11 21:08 ` Paul E. McKenney
2018-07-12 12:00 ` David Woodhouse
2018-07-12 12:53 ` Paul E. McKenney
2018-07-12 16:17 ` Paul E. McKenney
2018-07-16 15:40 ` Paul E. McKenney
2018-07-17 8:19 ` David Woodhouse
2018-07-17 12:56 ` Paul E. McKenney
2018-07-18 15:36 ` Paul E. McKenney
2018-07-18 16:01 ` David Woodhouse
2018-07-18 16:37 ` Paul E. McKenney
2018-07-18 19:41 ` David Woodhouse
2018-07-18 20:17 ` Paul E. McKenney
2018-07-19 0:26 ` Frederic Weisbecker
2018-07-19 6:45 ` Christian Borntraeger
2018-07-19 7:20 ` David Woodhouse
2018-07-19 10:23 ` Christian Borntraeger
2018-07-19 12:55 ` Paul E. McKenney
2018-07-19 13:14 ` Frederic Weisbecker
2018-07-19 13:36 ` David Woodhouse
2018-07-19 17:09 ` Paul E. McKenney [this message]
2018-07-23 8:08 ` David Woodhouse
2018-07-23 12:22 ` Paul E. McKenney
2018-07-19 0:32 ` Frederic Weisbecker
2018-07-19 3:11 ` Paul E. McKenney
2018-07-19 6:16 ` David Woodhouse
2018-07-19 13:17 ` Frederic Weisbecker
2018-07-19 13:15 ` Frederic Weisbecker
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