From: Greg KH <gregkh@linuxfoundation.org>
To: Matthew Wilcox <willy@infradead.org>
Cc: Zhouyi Zhou <zhouzhouyi@gmail.com>,
Chris Clayton <chris2553@googlemail.com>,
Oleksandr Natalenko <oleksandr@natalenko.name>,
Miaohe Lin <linmiaohe@huawei.com>,
Boqun Feng <boqun.feng@gmail.com>,
paulmck@kernel.org, linux-kernel <linux-kernel@vger.kernel.org>,
stable@vger.kernel.org, Chris Rankin <rankincj@gmail.com>,
Josh Triplett <josh@joshtriplett.org>,
Steven Rostedt <rostedt@goodmis.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Lai Jiangshan <jiangshanlai@gmail.com>,
Joel Fernandes <joel@joelfernandes.org>,
rcu <rcu@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Linux-MM <linux-mm@kvack.org>,
"Huang, Ying" <ying.huang@intel.com>
Subject: Re: linux-5.13.2: warning from kernel/rcu/tree_plugin.h:359
Date: Thu, 22 Jul 2021 16:00:24 +0200 [thread overview]
Message-ID: <YPl5+PkfBPI0pdHn@kroah.com> (raw)
In-Reply-To: <YPlyHF5eNDiTMKzq@kroah.com>
On Thu, Jul 22, 2021 at 03:26:52PM +0200, Greg KH wrote:
> On Thu, Jul 22, 2021 at 01:36:02PM +0100, Matthew Wilcox wrote:
> > On Thu, Jul 22, 2021 at 04:57:57PM +0800, Zhouyi Zhou wrote:
> > > Thanks for reviewing,
> > >
> > > What I have deduced from the dmesg is:
> > > In function do_swap_page,
> > > after invoking
> > > 3385 si = get_swap_device(entry); /* rcu_read_lock */
> > > and before
> > > 3561 out:
> > > 3562 if (si)
> > > 3563 put_swap_device(si);
> > > The thread got scheduled out in
> > > 3454 locked = lock_page_or_retry(page, vma->vm_mm, vmf->flags);
> > >
> > > I am only familiar with Linux RCU subsystem, hope mm people can solve our
> > > confusions.
> >
> > I don't understamd why you're still talking. The problem is understood.
> > You need to revert the unnecessary backport of 2799e77529c2 and
> > 2efa33fc7f6e
>
> Sorry for the delay, will go do so in a minute...
Both now reverted from 5.10.y and 5.13.y.
thanks,
greg k-h
next prev parent reply other threads:[~2021-07-22 14:00 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-17 20:22 linux-5.13.2: warning from kernel/rcu/tree_plugin.h:359 Chris Clayton
2021-07-18 21:01 ` Oleksandr Natalenko
2021-07-18 21:03 ` Oleksandr Natalenko
2021-07-18 21:22 ` Matthew Wilcox
2021-07-18 21:36 ` Chris Clayton
2021-07-18 21:59 ` Paul E. McKenney
2021-07-18 22:51 ` Matthew Wilcox
2021-07-19 1:53 ` Paul E. McKenney
2021-07-19 2:24 ` Zhouyi Zhou
2021-07-19 2:27 ` Zhouyi Zhou
2021-07-19 2:43 ` Matthew Wilcox
2021-07-19 2:59 ` Zhouyi Zhou
2021-07-19 10:14 ` Boqun Feng
2021-07-19 11:12 ` Miaohe Lin
2021-07-19 11:17 ` Oleksandr Natalenko
2021-07-19 11:22 ` Matthew Wilcox
2021-07-19 11:50 ` Miaohe Lin
2021-07-19 11:59 ` Oleksandr Natalenko
2021-07-19 12:08 ` Miaohe Lin
2021-07-19 12:12 ` Oleksandr Natalenko
2021-07-19 12:16 ` Matthew Wilcox
2021-07-19 12:23 ` Oleksandr Natalenko
2021-07-19 16:47 ` Zhouyi Zhou
2021-07-19 16:56 ` Zhouyi Zhou
2021-07-22 7:30 ` Chris Clayton
2021-07-22 8:57 ` Zhouyi Zhou
2021-07-22 12:36 ` Matthew Wilcox
2021-07-22 13:26 ` Greg KH
2021-07-22 14:00 ` Greg KH [this message]
2021-07-23 1:51 ` Miaohe Lin
2021-07-23 7:02 ` Greg KH
2021-07-23 7:13 ` Miaohe Lin
2021-07-22 17:44 ` Zhouyi Zhou
2021-07-22 14:05 ` Paul E. McKenney
2021-07-19 12:17 ` Miaohe Lin
2021-07-19 7:32 ` Chris Clayton
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