* [BUG bisected] sysfs: cannot create duplicate filename '/devices/virtual/workqueue/scsi_tmf_1073822488'
@ 2024-08-21 2:16 Paul E. McKenney
2024-08-21 16:18 ` Tejun Heo
0 siblings, 1 reply; 5+ messages in thread
From: Paul E. McKenney @ 2024-08-21 2:16 UTC (permalink / raw)
To: matthew.brost; +Cc: tj, jiangshanlai, sfr, linux-kernel, linux-next
Hello!
Running rcutorture scenario TREE01 on next-20240820 on a dual-socket x86
system (and for that matter on my laptop) got me this warning during boot:
sysfs: cannot create duplicate filename '/devices/virtual/workqueue/scsi_tmf_1073822488'
The number at the end varies from run to run.
Bisection landed here:
b188c57af2b5 ("workqueue: Split alloc_workqueue into internal function and lockdep init")
My reproducer is to run this at the top of the Linux-kernel file tree:
tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --duration 1m --configs "2*TREE01" --trust-make
Reverting this commit on top of next-20240820 gets me clean runs.
I cannot see how the patch would make this happen, but then again,
I don't know this code at all well.
Thoughts?
Thanx, Paul
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [BUG bisected] sysfs: cannot create duplicate filename '/devices/virtual/workqueue/scsi_tmf_1073822488' 2024-08-21 2:16 [BUG bisected] sysfs: cannot create duplicate filename '/devices/virtual/workqueue/scsi_tmf_1073822488' Paul E. McKenney @ 2024-08-21 16:18 ` Tejun Heo 2024-08-21 16:35 ` Tejun Heo 0 siblings, 1 reply; 5+ messages in thread From: Tejun Heo @ 2024-08-21 16:18 UTC (permalink / raw) To: Paul E. McKenney Cc: matthew.brost, jiangshanlai, sfr, linux-kernel, linux-next On Tue, Aug 20, 2024 at 07:16:00PM -0700, Paul E. McKenney wrote: > Running rcutorture scenario TREE01 on next-20240820 on a dual-socket x86 > system (and for that matter on my laptop) got me this warning during boot: > > sysfs: cannot create duplicate filename '/devices/virtual/workqueue/scsi_tmf_1073822488' > > The number at the end varies from run to run. > > Bisection landed here: > > b188c57af2b5 ("workqueue: Split alloc_workqueue into internal function and lockdep init") > > My reproducer is to run this at the top of the Linux-kernel file tree: > > tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --duration 1m --configs "2*TREE01" --trust-make > > Reverting this commit on top of next-20240820 gets me clean runs. > > I cannot see how the patch would make this happen, but then again, > I don't know this code at all well. > > Thoughts? Hmmm... I have a hard time imagining that change causing that error. My bet is unreliable reproducer. I'll try the repro. Thanks. -- tejun ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [BUG bisected] sysfs: cannot create duplicate filename '/devices/virtual/workqueue/scsi_tmf_1073822488' 2024-08-21 16:18 ` Tejun Heo @ 2024-08-21 16:35 ` Tejun Heo 2024-08-21 17:37 ` Paul E. McKenney 0 siblings, 1 reply; 5+ messages in thread From: Tejun Heo @ 2024-08-21 16:35 UTC (permalink / raw) To: Paul E. McKenney Cc: matthew.brost, jiangshanlai, sfr, linux-kernel, linux-next 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 ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [BUG bisected] sysfs: cannot create duplicate filename '/devices/virtual/workqueue/scsi_tmf_1073822488' 2024-08-21 16:35 ` Tejun Heo @ 2024-08-21 17:37 ` Paul E. McKenney 2024-08-21 18:14 ` Paul E. McKenney 0 siblings, 1 reply; 5+ messages in thread From: Paul E. McKenney @ 2024-08-21 17:37 UTC (permalink / raw) To: Tejun Heo; +Cc: matthew.brost, jiangshanlai, sfr, linux-kernel, linux-next On Wed, Aug 21, 2024 at 06:35:41AM -1000, Tejun Heo wrote: > 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 am glad that it was not just me being blind, then. ;-) And thank you for trying this out! > 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 You are right, that is not the expected result. > 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 There was already an "init" program, so one thing to try is to remove it and re-run. The kvm.sh script will then rebuild it. I just tried that in case some recent change made this fail to work, and it "worked for me": Creating a statically linked C-language initrd Done creating a statically linked C-language initrd I will also be testing next-20240821 in case it magically got better. Stranger things have happened... Thanx, Paul > 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 ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [BUG bisected] sysfs: cannot create duplicate filename '/devices/virtual/workqueue/scsi_tmf_1073822488' 2024-08-21 17:37 ` Paul E. McKenney @ 2024-08-21 18:14 ` Paul E. McKenney 0 siblings, 0 replies; 5+ messages in thread From: Paul E. McKenney @ 2024-08-21 18:14 UTC (permalink / raw) To: Tejun Heo; +Cc: matthew.brost, jiangshanlai, sfr, linux-kernel, linux-next On Wed, Aug 21, 2024 at 10:37:21AM -0700, Paul E. McKenney wrote: > On Wed, Aug 21, 2024 at 06:35:41AM -1000, Tejun Heo wrote: > > 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 am glad that it was not just me being blind, then. ;-) > > And thank you for trying this out! > > > 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 > > You are right, that is not the expected result. > > > 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 > > There was already an "init" program, so one thing to try is to remove it > and re-run. The kvm.sh script will then rebuild it. > > I just tried that in case some recent change made this fail to work, and > it "worked for me": > > Creating a statically linked C-language initrd > Done creating a statically linked C-language initrd > > I will also be testing next-20240821 in case it magically got better. > Stranger things have happened... And it magically got better. Yay? Unfortunately not the case for the other bug I was chasing, but you cannot have everything... Apologies for the noise! Thanx, Paul > > 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 ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2024-08-21 18:14 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2024-08-21 2:16 [BUG bisected] sysfs: cannot create duplicate filename '/devices/virtual/workqueue/scsi_tmf_1073822488' Paul E. McKenney 2024-08-21 16:18 ` Tejun Heo 2024-08-21 16:35 ` Tejun Heo 2024-08-21 17:37 ` Paul E. McKenney 2024-08-21 18:14 ` Paul E. McKenney
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