linux-kernel - Re: Re: Re: possible deadlock in smp_call_function_many

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Message-ID: <43954530.4f11.1996c7c9799.Coremail.baishuoran@hrbeu.edu.cn>
Date: Sun, 21 Sep 2025 21:35:28 +0800 (GMT+08:00)
From: 白烁冉 <baishuoran@...eu.edu.cn>
To: "Thomas Gleixner" <tglx@...utronix.de>
Cc: huk23@...udan.edu.cn, linux-kernel@...r.kernel.org,
	syzkaller@...glegroups.com
Subject: Re: Re: Re: possible deadlock in smp_call_function_many_cond


> Can you please stop top-posting?

Sorry for that, I didn’t notice this issue before. We’ve taken some time to re-learn the email communication rules and will pay more attention in the future. Again, my apologies for the inconvenience.

> I told you last time:
> 
> >> > [    0.427302][    T0] Unknown kernel command line parameters "hrtimer_expire_entry hrtimer_expire_exit spec_store_bypass_disable=prctl nbds_max=32", will be passed to user space.
> >> 
> >>                                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> >> How is this helpful?
> 
> This does not enable the trace events. You need:
> 
>    trace_event="hrtimer_expire_entry,hrtimer_expire_exit"
> 
> to make that work.
> 

We updated the new test log, which includes hrtimer_expire_entry,hrtimer_expire_exit and ftrace_dump_on_oops:

Log: https://github.com/pghk13/Kernel-Bug/blob/main/0702_6.14/INFO%3A%20rcu%20detected%20stall%20in%20sys_select/122log9.20.txt

————
thanks，
Bai