Ubuntu
linux package

  1. Bug #1690085
  2. Comment #341

Comment 341 for bug 1690085

Revision history for this message
In , laforge (laforge-linux-kernel-bugs) wrote :

FYI: I'm experiencing a similar o the same issue on a Ryzen 1700X

vendor_id : AuthenticAMD
cpu family : 23
model : 1
model name : AMD Ryzen 7 1700X Eight-Core Processor
stepping : 1
microcode : 0x8001129

Base Board Information
        Manufacturer: ASUSTeK COMPUTER INC.
        Product Name: PRIME B350M-A
        Version: Rev X.0x
BIOS Information
        Vendor: American Megatrends Inc.
        Version: 3803
        Release Date: 01/22/2018

where at least one per day the machine would hang with
<pre>
Message from syslogd@host2 at Mar 23 21:35:56 ...
 kernel:[31606.963222] NMI watchdog: BUG: soft lockup - CPU#15 stuck for 23s! [(md-udevd):2623]
</pre>

being the last messages. C6 was enabled for both the package and the core by the bios.

The machine would hang quite reliably at least once every 24 hours, typically during the idle night times. The load at that point was 0.01.

OS/Kernel is Debian 9 / 4.9.0-6-amd64, which has "CONFIG_RCU_EXPERT is not set" and hence none of the [old or new] more detailed RCU settings are enabled.

Have decided not to upgrade the kernel but simply disable C6 and wait...