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Date: Fri, 24 Nov 2023 16:10:07 +0000
From: Greg KH <gregkh@linuxfoundation.org>
To: Ronald Monthero <debug.penguin32@gmail.com>
Cc: stable@vger.kernel.org
Subject: Re: Backport submission - rcu: Avoid tracing a few functions
 executed in stop machine
Message-ID: <2023112431-matching-imperfect-1b76@gregkh>
References: <CALk6Uxo5ymxu_P_7=LnLZwTgjYbrdE7gzwyeQVxeR431SPuxyw@mail.gmail.com>
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On Tue, Nov 21, 2023 at 12:09:38AM +1000, Ronald Monthero wrote:
> Dear stable maintainers,
> I like to indicate the oops encountered and request the below patch to
> be backported to v 5.15. The fix is important to avoid recurring oops
> in context of rcu detected stalls.
> 
> subject: rcu: Avoid tracing a few functions executed in stop machine
> commit  48f8070f5dd8
> Target kernel version   v 5.15
> Reason for Application: To avoid oops due to rcu_prempt detect stalls
> on cpus/tasks
> 
> Environment and oops context: Issue was observed in my environment on
> 5.15.193 kernel (arm platform). The patch is helpful to avoid the
> below oops indicated in [1] and [2]

As the patch does not apply cleanly, we need a working and tested
backport so we know to apply the correct version.

Can you please provide that as you've obviously already done this?

thanks,

greg k-h