From: Miaohe Lin <linmiaohe@huawei.com>
To: Greg KH <gregkh@linuxfoundation.org>,
Matthew Wilcox <willy@infradead.org>
Cc: Zhouyi Zhou <zhouzhouyi@gmail.com>,
Chris Clayton <chris2553@googlemail.com>,
Oleksandr Natalenko <oleksandr@natalenko.name>,
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: Fri, 23 Jul 2021 09:51:09 +0800 [thread overview]
Message-ID: <01fef2db-bd7e-12b6-ec21-2addd02e7062@huawei.com> (raw)
In-Reply-To: <YPl5+PkfBPI0pdHn@kroah.com>
On 2021/7/22 22:00, Greg KH wrote:
> 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.
>
I browsed my previous backport notifying email and found that these two patches are also
backported into 5.12. And it seems it's missed.
Thanks.
> thanks,
>
> greg k-h
> .
>
next prev parent reply other threads:[~2021-07-23 1:51 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <c9fd1311-662c-f993-c8ef-54af036f2f78@googlemail.com>
2021-07-18 21:01 ` linux-5.13.2: warning from kernel/rcu/tree_plugin.h:359 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
[not found] ` <CAABZP2yh3J8+P=3PLZVaC47ymKC7PcfQCBBxjXJ9Ybn+HREbdg@mail.gmail.com>
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
2021-07-23 1:51 ` Miaohe Lin [this message]
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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