Ryzen 1800X freeze - rcu_sched detected stalls on CPUs/tasks

[Vincent]

Hi,

We aregetting various kernel crash on a pretty new config.
We're using Ryzen 1800X CPU with X370 Gaming Pro Carbon MB (7A32V1) using latest BIOS available (1.52)

We are running Ubuntu 17.04 (amd64), we've tried different kernel version, native one and releases from http://kernel.ubuntu.com/~kernel-ppa/mainline/ too.
Tested kernel version:

native 17.04 kernel
4.10.15

Issues are the same, we're getting random freeze on the machine.

Here is kern.log entry when happening :

May 10 22:41:56 dev2 kernel: [24366.186246] INFO: rcu_sched detected stalls on CPUs/tasks:
May 10 22:41:56 dev2 kernel: [24366.187618] 0-...: (1 GPs behind) idle=49b/1/0 softirq=28561/28563 fqs=913449
May 10 22:41:56 dev2 kernel: [24366.188977] (detected by 12, t=1860207 jiffies, g=10001, c=10000, q=4656)
May 10 22:41:56 dev2 kernel: [24366.190344] Task dump for CPU 0:
May 10 22:41:56 dev2 kernel: [24366.190345] swapper/0 R running task 0 0 0 0x00000008
May 10 22:41:56 dev2 kernel: [24366.190348] Call Trace:
May 10 22:41:56 dev2 kernel: [24366.190354] ? native_safe_halt+0x6/0x10
May 10 22:41:56 dev2 kernel: [24366.190355] ? default_idle+0x20/0xd0
May 10 22:41:56 dev2 kernel: [24366.190358] ? arch_cpu_idle+0xf/0x20
May 10 22:41:56 dev2 kernel: [24366.190360] ? default_idle_call+0x23/0x30
May 10 22:41:56 dev2 kernel: [24366.190362] ? do_idle+0x16f/0x200
May 10 22:41:56 dev2 kernel: [24366.190364] ? cpu_startup_entry+0x71/0x80
May 10 22:41:56 dev2 kernel: [24366.190366] ? rest_init+0x77/0x80
May 10 22:41:56 dev2 kernel: [24366.190368] ? start_kernel+0x464/0x485
May 10 22:41:56 dev2 kernel: [24366.190369] ? early_idt_handler_array+0x120/0x120
May 10 22:41:56 dev2 kernel: [24366.190371] ? x86_64_start_reservations+0x24/0x26
May 10 22:41:56 dev2 kernel: [24366.190372] ? x86_64_start_kernel+0x14d/0x170
May 10 22:41:56 dev2 kernel: [24366.190373] ? start_cpu+0x14/0x14
May 10 22:44:56 dev2 kernel: [24546.188093] INFO: rcu_sched detected stalls on CPUs/tasks:
May 10 22:44:56 dev2 kernel: [24546.189461] 0-...: (1 GPs behind) idle=49b/1/0 softirq=28561/28563 fqs=935027
May 10 22:44:56 dev2 kernel: [24546.190823] (detected by 14, t=1905212 jiffies, g=10001, c=10000, q=4740)
May 10 22:44:56 dev2 kernel: [24546.192191] Task dump for CPU 0:
May 10 22:44:56 dev2 kernel: [24546.192192] swapper/0 R running task 0 0 0 0x00000008
May 10 22:44:56 dev2 kernel: [24546.192195] Call Trace:
May 10 22:44:56 dev2 kernel: [24546.192199] ? native_safe_halt+0x6/0x10
May 10 22:44:56 dev2 kernel: [24546.192201] ? default_idle+0x20/0xd0
May 10 22:44:56 dev2 kernel: [24546.192203] ? arch_cpu_idle+0xf/0x20
May 10 22:44:56 dev2 kernel: [24546.192204] ? default_idle_call+0x23/0x30
May 10 22:44:56 dev2 kernel: [24546.192206] ? do_idle+0x16f/0x200
May 10 22:44:56 dev2 kernel: [24546.192208] ? cpu_startup_entry+0x71/0x80
May 10 22:44:56 dev2 kernel: [24546.192210] ? rest_init+0x77/0x80
May 10 22:44:56 dev2 kernel: [24546.192211] ? start_kernel+0x464/0x485
May 10 22:44:56 dev2 kernel: [24546.192213] ? early_idt_handler_array+0x120/0x120
May 10 22:44:56 dev2 kernel: [24546.192214] ? x86_64_start_reservations+0x24/0x26
May 10 22:44:56 dev2 kernel: [24546.192215] ? x86_64_start_kernel+0x14d/0x170
May 10 22:44:56 dev2 kernel: [24546.192217] ? start_cpu+0x14/0x14

Depending on the kernel version, we've got NMI watchdog errors related to CPU stuck (mentioning the CPU core id, which is random).
Crash is happening randomly, but in general after some hours (3-4h).

Now, we've installed kernel 4.11.0-041100-generic #201705041534 this morning and waiting for crash...
For now, the machine is not "used", at least, it's not CPU stressed...

Thanks
---
ApportVersion: 2.20.4-0ubuntu4
Architecture: amd64
DistroRelease: Ubuntu 17.04
InstallationDate: Installed on 2017-05-09 (1 days ago)
InstallationMedia: Ubuntu-Server 17.04 "Zesty Zapus" - Release amd64 (20170412)
Package: linux (not installed)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
Tags: zesty
Uname: Linux 4.11.0-041100-generic x86_64
UnreportableReason: The running kernel is not an Ubuntu kernel
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

_MarkForUpload: True

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1690085

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Vincent (hvincent13)]

apport information

[Vincent (hvincent13)]

apport information

[Lipido (lipido)]

Hi Vicent,

Did you experience more crashes with kernel 4.11?

Thank you!

[Vincent (hvincent13)]

Hi Lipido,

Yes, i'm still experiencing crashes, even when using 4.11

Please find full kern.log in attachment.

Regards,

[Lipido (lipido)]

Ok, me too :-(

Crashes appear from 24-48h of operation.

My hardware is:
- SSUS PRIME B350-Plus
- Amd Ryzen 5 1600

OS: Ubuntu 16.04

Tried:
- Update BIOS to the latest (v 609)
- Kernel 4.10
- Disable SMT in bios (from 12 threads to 6 threads)
- Boot clocksource=tsc iommu=soft
- Disable IOMMU in bios

None of these work. I was waiting for 4.11 to be available for Ubuntu as an official package, but it seems that this will not work either.

Another link talking about what seems to be the same issue:

https://forum.level1techs.com/t/ryzen-vs-ubuntu/115715/22

[Joseph Salisbury (jsalisbury)]

Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.12 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.12-rc1/

[Vincent (hvincent13)]

Hi Joseph,

I've just installed 4.12-rc1.
Now waiting for a crash... or not (hope so !)

Regards,

[Vincent (hvincent13)]

Just go a kernel panic...

How to add the tag kernel-bug-exists-upstream ?

[Joseph Salisbury (jsalisbury)]

This issue appears to be an upstream bug, since you tested the latest upstream kernel. Would it be possible for you to open an upstream bug report[0]? That will allow the upstream Developers to examine the issue, and may provide a quicker resolution to the bug.

Please follow the instructions on the wiki page[0]. The first step is to email the appropriate mailing list. If no response is received, then a bug may be opened on bugzilla.kernel.org.

Once this bug is reported upstream, please add the tag: 'kernel-bug-reported-upstream'.

[0] https://wiki.ubuntu.com/Bugs/Upstream/kernel

[Vincent (hvincent13)]

Hi,

Could you please tell me which address I have to send the mail to?
I don't really understand how to achieve this bug report on the mailing list.

Thanks,

[Vincent (hvincent13)]

Hi,

It looks like that the system is stable when removing "nouveau" driver.
Waiting 24/48h and will post again.

Regards,

[camparijet (iichikolamp)]

Hi Vincent,

I also met the problem, and your advice removing "nouveau" succeeded for work-around to stabilize system. Before it freeze every 3-5hr after booting up, but now working without problem for 2 days.

My enviroment is:
- cpu: Ryzen 1700
- motherboard: ASUS B350M-A
- graphics card: NVIDIA GK208
- kernel: 4.11.0-041100rc8-generic
- dist: 17.04

[Vincent (hvincent13)]

Hi,

5 days update now and no crash.

camparijet => did you installed NVIDIA driver instead ?

Regards,

[camparijet (iichikolamp)]

Hi Vincent,

> camparijet => did you installed NVIDIA driver instead ?

No. I don't have to use the card for my purpose, so simply i disable it.

[Alex Jones (blenheimears)]

I'm seeing this crash even with the Nvidia official driver.

[Alex Jones (blenheimears)]

This is a hardware bug in the CPU. This ticket should be closed as invalid.

[Alex Jones (blenheimears)]

Reopening because even though this is a known issue with the CPU we could still implement a workaround. One workaround is to disable address space layout randomization:

echo 0 >/proc/sys/kernel/randomize_va_space

However, that would be disabling a security feature.

[Joseph Salisbury (jsalisbury)]

This change was made by a bot.

[Marc Rene Schädler (suaefar)]

Was this issue officially confirmed to be a hardware bug in Ryzen processors by AMD?
If so, could you provide a link to the statement?

Disabling address space layout randomization (ASLR) seems to alleviate the problem, but does it solve it?

I am investigating unstable behavior under load which could be related.
There, disabling ASLR is not sufficient!
People suggest to increase SOC voltages, use specific versions of the kernel and the like.
See https://community.amd.com/thread/215773?start=135&tstart=0 for more info.

[Alex Jones (blenheimears)]

AMD has not publicly commented on this issue that I'm aware of. This issue has been seen on many different operating systems. DragonFlyBSD includes a workaround for this issue. The workaround on Linux is to compile the kernel with CONFIG_RCU_NOCB_CPU, CONFIG_RCU_NOCB_CPU_ALL, and disable ASLR using "echo 0 >/proc/sys/kernel/randomize_va_space". This can be put into rc.local. It's also possible to hardcode ASLR as disabled into the kernel, but this requires modifying the kernel source, not just the config file. There is a new AGESA update released about a week ago, 1.0.0.6a, although I have not tested whether the new AGESA alone (without any kernel changes) solves the issue.

[Alex Jones (blenheimears)]

I just tested 1.0.0.6a AGESA, and it does not solve this issue. In some cases just one program will crash, and in other cases the entire system will crash. I will test the workaround above later.

[Alex Jones (blenheimears)]

If any of your RAM timings are odd (eg. 17), setting them to the next even number (eg. 18) helps a lot. Recompiling the kernel with CONFIG_RCU_NOCB_CPU and CONFIG_RCU_NOCB_CPU_ALL, and disabling ASLR is still necessary though. It may also be a good idea to give the SOC slightly more voltage, but not more than 1.2 V.

[Kai-Heng Feng (kaihengfeng)]

Alex,

Can you provide link on how DragonflyBSD fixed this issue?

[Alex Jones (blenheimears)]

This is the DragonFlyBSD commit. https://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/b48dd28447fc8ef62fbc963accd301557fd9ac20

It appears that there are two different ways that the system can crash, which is why it is necessary to both disable ASLR and to compile the kernel with CONFIG_RCU_NOCB_CPU and CONFIG_RCU_NOCB_CPU_ALL. The ASLR-related crash usually results in a single or a few programs crashing (although if an important program crashes it can bring down the entire system) and happens under heavy load. The other crash only happens if the kernel was compiled without CONFIG_RCU_NOCB_CPU and CONFIG_RCU_NOCB_CPU_ALL (Ubuntu's kernel is compiled without these options) and happens when the system is idle or nearly idle, and results in a complete system crash.

[Alex Jones (blenheimears)]

If the motherboard allows it, disabling the OpCache will completely prevent (or at least greatly reduce the probability of) the ASLR-related crash, even if ASLR is enabled in the kernel. As far as I'm aware it has no effect on the other type of crash.

[Alex Jones (blenheimears)]

I've also determined that changing the CPU, memory, or SOC voltages or timings has little or no effect on either type of crash.

[Kai-Heng Feng (kaihengfeng)]

This is beyond my expertise - let's see what upstream can do.

[Torge (cyslider)]

I also experience this problem since I updated yesterday.

I am using Kubuntu 16.04 with KDE backports enabled.
I also have a Ryzen 1800X and an Asrock X370 Gaming professional

I experience this either when I boot and don't log in promptly or when I enter the lockscreen.

After reading this page I tried to run
  seq 1 | xargs -P0 -n1 md5sum /dev/zero &

as root to always keep one CPU core busy and indeed this seems to prevent the lockscreen problem...

I would also like to note that the system was not 100% frozen, once every few minutes it seemed to response for a short time, enabling me to switch to the TTY. Then I always saw some processes hanging at 100% that I could not kill, or the kill was delayed for a long time. I always see the errors in the initial posts during that time. The TTY seemes to work fine though, once entered though.

[David Wilson (plottt)]

I've ran into this problem several times. After disabling C-states in the motherboard, my system has been running stable for ~5 weeks uptime so far.

[Torge (cyslider)]

Ok, this trick did not help and my PC did not make it through the night without freezing again.

However I finally found the real problem. I installed oibaf a while back as my Kubuntu was flickering all over the place. Now it seems the be the source of my problem. I deinstalled oibaf again and now everything seems fine. No lock screen freezing for me anymore.

[Stuart Page (sdpagent)]

Just wanting to report that I am also experiencing this issue with a freshly installed Ubuntu Server 16.04.3 with 4.10 kernel on the 22nd August 2017. All the updates applied and running as a KVM host with hardware:

Ryzen 1700 (non-x)
Motherboard: Asus prime B350-Plus
Bios: - Version 0805
 - Disabled SMT
 - Disabled c-states

[xb5i7o (xb5i7o)]

Hi guys,

Im getting the same issues, brand new build.

Ryzen 1800x
Asrock X370 Taichi
BIOS: 3.10 (latest)
I tried disabling cool n quiet and c-state

However there is another option under advanced - for GLOBAL C-States that i just disabled today and i am waiting to see what will happen.

On BIOS v3.00 PC would freeze after 6 hours of idling or not touching anything. Come back to see my keyboard and mouse and everything was frozen.
With BIOS v.3.10 now i get random reboots atleast once a day.

Im running Ubuntu 16.04.3 Kernel 4.4.0-93

Anyone know to direct me where the SoC voltage would be in BIOS? is it the VDD SoC?
Anyone know how to update my kernel to 4.10 if it tells me i have the latest?

[Stuart Page (sdpagent)]

I finally managed to figure out how to compile a kernel with RCU_NOCB and disabled ASLR as Alex Jones mentioned, and it appears to have worked for me and another guy who helped me put the tutorial together:

http://blog.programster.org/ubuntu-16-04-compile-custom-kernel-for-ryzen

[Kai-Heng Feng (kaihengfeng)]

Stuart,

Does this issue also happen on latest mainline kernel?

[Franck Charras (franckc)]

Hi,
I'm getting the same issues on several identical builds, with an ASUS prime X370-PRO motherboard.
It's very hard to analyze since it happens randomly every other week, and it leaves no logs. It seems that the freeze happens at idle after very high memory load (observation after logging CPU and RAM loads).
Compiling the kernel as suggested in this thread didn't work (new freeze this morning).

[tgui (eric-c-morgan)]

I too still have random computer shutdowns without logs. Uptime varies from a couple days to a week or so. It happens it seems after being relatively idle for a long period. I do have high memory usage because of the VMs I run.

I've disabled C-states, cool and quiet, tested memory, and so forth. I also compiled a new kernel as mentioned by Stuart. I do not have segfaults with compilations.

I am willing to run tests and provide info. Please let me know if anyone wants something.

Ubuntu 16.04
Asrock x370 ITX
32GB Ram
Ryzen 1700

[Franck Charras (franckc)]

Ryzen CPUs manufactured before week 24 of this year were known to have issues (especially the segfault issue). It was officially fixed for all ryzen manufactured after week 30. All my ryzen are pre-24 CPUs and they all have this silent crash issue. Does it also happen with the post week 30 ryzen ? (@tgui what is yours ?)

[AS (as2008)]

I can confirm the issue with a week 33 Ryzen 1700 on Asus Prime B350 Plus.
I had segfaults with my previous 1700 (week 22 iirc). No more segfaults with the week 33 CPU but still random crashes on (long time) idle.

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[agmondroid (agmondroid-linux-kernel-bugs)]

Hello,

after while with random AMD Ryzen 5 reboots, final solution was add Kernel parameter:

acpi_osi=Linux

3 days of stability with Ubuntu 18.04 5.4.0-80-generic and counting.

[pmenzel+bugzilla.kernel.org (pmenzel+bugzilla.kernel.org-linux-kernel-bugs)]

Agmon, thank you for your report. Please open a separate issue with the full output of `dmesg` attached, and the output of `acpidump`. Please reference the issues here.

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[Wilbur310 (wilbur310-linux-kernel-bugs)]

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[katiyar.pradeep97 (katiyar.pradeep97-linux-kernel-bugs)]

(In reply to Riccardo Gori from comment #7)
> I have the exact same problem with the same setup (Ryzen 1700X).
>
> I have experienced the problem with kernels 4.4, 4.10 and now 4.12.8. The
> system freeze also without X and without nvidia proprietary drivers.

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[katiyar.pradeep97 (katiyar.pradeep97-linux-kernel-bugs)]

(In reply to Hanna Baker from comment #777)
> (In reply to Riccardo Gori from comment #7)
> > I have the exact same problem with the same setup (Ryzen 1700X).
> >
> > I have experienced the problem with kernels 4.4, 4.10 and now 4.12.8. The
> > system freeze also without X and without nvidia proprietary drivers.
>
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[jnonon+kernel (jnonon+kernel-linux-kernel-bugs)]

Hi, I was encountering this issue in a frequent basis. I tried several methods listed all across the internet to solve the "soft lockup" specially while using rsync to copy data from one disk to another.

At some point, I ran memtest86 to check if there was a memory problem. I have 4 DIMM installed, of 16GB. The BIOS settings were mostly set to auto for most fields. Memtest86 failed 25% of the test, which is really bad.

I noticed that Memtest86 reported metadata for each memory about the voltage setting to 1.350v. I noticed the Auto Setting in the bios had set those values to 1.200v instead.

After updating that value, I ran the test suite again, none failed. Ran rsync over a large directory, and did not trigger the soft lockup.

tldr; Make sure your RAM is correctly configured with the manufacturer recommended settings instead of Auto setting from the BIOS, this goes for both frequency and voltage.

[pmenzel+bugzilla.kernel.org (pmenzel+bugzilla.kernel.org-linux-kernel-bugs)]

Jonathan, thank you for the feedback. Please share the mainboard model and firmware, and the used memory for the record.

[nelsoneci (nelsoneci-linux-kernel-bugs)]

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[jnonon+kernel (jnonon+kernel-linux-kernel-bugs)]

Here is the setup:

Vendor: American Megatrends Inc.
Version: P4.80
Release Date: 02/16/2022
BIOS Revision: 5.17

Base Board Information
Manufacturer: ASRock
Product Name: X570 Taichi

Processor Information
Version: AMD Ryzen 9 3900X 12-Core Processor

Memory:
Kingston RAM KF3200C16D4/16GX 16GB DIMM DDR4 3200MT
XMP Profile: DDR4-3200 CL16-18-18 @1.35V

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