linux-kernel - Re: [BUG bisected] sysfs: cannot create duplicate filename '/devices/virtual/workqueue/scsi_tmf

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Message-ID: <ZsYXXd6tQAlFwkg8@slm.duckdns.org>
Date: Wed, 21 Aug 2024 06:35:41 -1000
From: Tejun Heo <tj@...nel.org>
To: "Paul E. McKenney" <paulmck@...nel.org>
Cc: matthew.brost@...el.com, jiangshanlai@...il.com, sfr@...b.auug.org.au,
	linux-kernel@...r.kernel.org, linux-next@...r.kernel.org
Subject: Re: [BUG bisected] sysfs: cannot create duplicate filename
 '/devices/virtual/workqueue/scsi_tmf_1073822488'

On Wed, Aug 21, 2024 at 06:18:45AM -1000, Tejun Heo wrote:
...
> > tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --duration 1m --configs "2*TREE01" --trust-make
...
> Hmmm... I have a hard time imagining that change causing that error. My bet
> is unreliable reproducer. I'll try the repro.

I'm probably doing something wrong but all the tests say that init
segfaulted in the log file:

  [    5.505986] init[1]: segfault at 28 ip 000000000040101f sp 00007fff1bbf6fc0 error 4 in init[101f,401000+1000] likely on CPU 12 (core 12, socket 0)
  [    5.509949] Code: Unable to access opcode bytes at 0x400ff5.
  [    5.512314] coredump: 1(init): over coredump resource limit, skipping core dump
  [    5.514976] coredump: 1(init): coredump has not been created, error -7
  [    5.516911] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b

Pasting the command output:

  $ tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --duration 1m --configs "2*TREE01" --trust-make
  tools/testing/selftests/rcutorture/initrd/init already exists, no need to create it
  Results directory: /home/htejun/os/linux-next/tools/testing/selftests/rcutorture/res/2024.08.21-06.31.03
  tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --duration 1m --configs 2*TREE01 --trust-make
  ----Start batch 1: Wed Aug 21 06:31:03 AM HST 2024
  TREE01 8: Starting build. Wed Aug 21 06:31:03 AM HST 2024
  TREE01 8: Waiting for build to complete. Wed Aug 21 06:31:03 AM HST 2024
  TREE01 8: Build complete. Wed Aug 21 06:31:30 AM HST 2024
  TREE01.2 8: Starting build. Wed Aug 21 06:31:30 AM HST 2024
  TREE01.2 8: Waiting for build to complete. Wed Aug 21 06:31:30 AM HST 2024
  TREE01.2 8: Build complete. Wed Aug 21 06:31:31 AM HST 2024
  ---- TREE01 8: Kernel present. Wed Aug 21 06:31:31 AM HST 2024
  ---- TREE01.2 8: Kernel present. Wed Aug 21 06:31:31 AM HST 2024
  ---- Starting kernels. Wed Aug 21 06:31:31 AM HST 2024
  ---- All kernel runs complete. Wed Aug 21 06:31:42 AM HST 2024
  ---- TREE01 8: Build/run results:
   --- Wed Aug 21 06:31:03 AM HST 2024: Starting build, PID 456070
   --- Wed Aug 21 06:31:31 AM HST 2024: Starting kernel
  CPU-hotplug kernel, adding rcutorture onoff.
   --- Wed Aug 21 06:31:31 AM HST 2024: Starting kernel, PID 483593
  Monitoring qemu job at pid 483623 Wed Aug 21 06:31:41 AM HST 2024
  TREE01 no success message, 0 successful version messages
  WARNING: Assertion failure in /home/htejun/os/linux-next/tools/testing/selftests/rcutorture/res/2024.08.21-06.31.03/TREE01/console.log TREE01
  WARNING: Summary: Call Traces: 1
  ---- TREE01.2 8: Build/run results:
   --- Wed Aug 21 06:31:30 AM HST 2024: Starting build, PID 482122
   --- Wed Aug 21 06:31:31 AM HST 2024: Starting kernel
  CPU-hotplug kernel, adding rcutorture onoff.
   --- Wed Aug 21 06:31:31 AM HST 2024: Starting kernel, PID 483619
  Monitoring qemu job at pid 483648 Wed Aug 21 06:31:41 AM HST 2024
  TREE01 no success message, 0 successful version messages
  WARNING: Assertion failure in /home/htejun/os/linux-next/tools/testing/selftests/rcutorture/res/2024.08.21-06.31.03/TREE01.2/console.log TREE01
  WARNING: Summary: Call Traces: 1


   --- Wed Aug 21 06:31:42 AM HST 2024 Test summary:
  Results directory: /home/htejun/os/linux-next/tools/testing/selftests/rcutorture/res/2024.08.21-06.31.03
  tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --duration 1m --configs 2*TREE01 --trust-make
  TREE01 ------- 
  TREE01 no success message, 0 successful version messages
  WARNING: Assertion failure in /home/htejun/os/linux-next/tools/testing/selftests/rcutorture/res/2024.08.21-06.31.03/TREE01/console.log TREE01
  WARNING: Summary: Call Traces: 1
  Completed in 10 vs. 60
  TREE01.2 ------- 
  TREE01.2 no success message, 0 successful version messages
  WARNING: Assertion failure in /home/htejun/os/linux-next/tools/testing/selftests/rcutorture/res/2024.08.21-06.31.03/TREE01.2/console.log TREE01.2
  WARNING: Summary: Call Traces: 1
  Completed in 10 vs. 60
  2 runs with build errors.
  2 runs with runtime errors.
   --- Done at Wed Aug 21 06:31:42 AM HST 2024 (39 seconds) exitcode 3

--
tejun