linux-kernel - Re: [peterz-queue:sched/hrtick] [entry,hrtimer,x86] ebf33ab570: BUG:soft_lockup-CPU##stuck_for#s![pthread_mutex1

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Message-ID: <20250911073304.GN4067720@noisy.programming.kicks-ass.net>
Date: Thu, 11 Sep 2025 09:33:04 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: kernel test robot <oliver.sang@...el.com>
Cc: oe-lkp@...ts.linux.dev, lkp@...el.com, linux-kernel@...r.kernel.org
Subject: Re: [peterz-queue:sched/hrtick] [entry,hrtimer,x86] ebf33ab570:
 BUG:soft_lockup-CPU##stuck_for#s![pthread_mutex1_:#]

On Mon, Sep 08, 2025 at 01:24:54PM +0800, kernel test robot wrote:
> 
> 
> Hello,
> 
> kernel test robot noticed "BUG:soft_lockup-CPU##stuck_for#s![pthread_mutex1_:#]" on:
> 
> commit: ebf33ab5707c7c9ea25e3c03540b1329ad9aff1d ("entry,hrtimer,x86: Push reprogramming timers into the interrupt return path")
> https://git.kernel.org/cgit/linux/kernel/git/peterz/queue.git sched/hrtick
> 
> in testcase: will-it-scale
> version: will-it-scale-x86_64-75f66e4-1_20250906
> with following parameters:
> 
> 	nr_task: 100%
> 	mode: thread
> 	test: pthread_mutex1
> 	cpufreq_governor: performance
> 
> 
> 
> config: x86_64-rhel-9.4
> compiler: gcc-13
> test machine: 64 threads 2 sockets Intel(R) Xeon(R) Gold 6346 CPU @ 3.10GHz (Ice Lake) with 256G memory
> 
> (please refer to attached dmesg/kmsg for entire log/backtrace)
> 

Is this the same issue again as last time? Eg. disabling all the perf
monitors makes it go?