linux-kernel - Re: [QUESTION] problems report: rcu_read_unlock_special() called in irq

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Message-ID: <279d2f06-d4f7-46e1-9678-999a2d19b710@nvidia.com>
Date: Tue, 1 Jul 2025 09:29:57 -0400
From: Joel Fernandes <joelagnelf@...dia.com>
To: Qi Xi <xiqi2@...wei.com>, paulmck@...nel.org,
 Xiongfeng Wang <wangxiongfeng2@...wei.com>
Cc: Joel Fernandes <joel@...lfernandes.org>, ankur.a.arora@...cle.com,
 Frederic Weisbecker <frederic@...nel.org>, Boqun Feng
 <boqun.feng@...il.com>, neeraj.upadhyay@...nel.org, urezki@...il.com,
 rcu@...r.kernel.org, linux-kernel@...r.kernel.org,
 "Wangshaobo (bobo)" <bobo.shaobowang@...wei.com>,
 Xie XiuQi <xiexiuqi@...wei.com>
Subject: Re: [QUESTION] problems report: rcu_read_unlock_special() called in
 irq_exit() causes dead loop



On 7/1/2025 5:20 AM, Qi Xi wrote:
> Hello everyone,
> 
> Friendly ping about this problem :)
> 

Ah, thanks for checking. The fix is slated for kernel 6.17.

If you want to test it, could you apply it in advance from the RCU tree?

You need these 2:

https://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux.git/commit/?h=next&id=6758c93749f8bf09b9282f100c5dd0a5c501f91c

https://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux.git/commit/?h=next&id=3cd298bf3bb69e3bca6abfe97e1b44ffa37f3dee

Thanks.