I have Ryzen 7 1800X on Asus Prime X370-Pro. I upgraded the BIOS to
v4011(Update AGESA 1.0.0.2a + SMU 43.18) and:
1) turned on the "Typical Current Idle" option.
2) stopped using zenstates.py -- which I had been using to enable "C6 Core"
but disable "C6 Package" (to no avail).
3) did *not* change Linux -- which was 4.16.5 -- Fedora 27.
4) continued to use CONFIG_RCU_NOCB_CPU and rcu_nocbs=0-15
After 67 days uptime (leaving the system completely idle and changing
nothing), I became convinced that the "Typical Current Idle" option has
dealt with the "freezing when idle" problem.
When I say "freezing when idle", what I mean is: if the machine is left
idle (typically over night) it simply stops responding. Nothing at all
is logged -- no application, driver or kernel errors or warnings are
logged -- the machine is still powered up, but frozen solid. The only
way to restart the machine is to power down and up again.
Reviewing this thread, it seems to be mostly concerned with the
"freezing while idle" issue.
The symptoms of the original "Random Soft Lockup" include log messages
of the form:
NMI watchdog: BUG: soft lockup - CPU#12 stuck for 23s!
is that related to "freezing while idle", or is it a separate issue ?
I get the impression that CONFIG_RCU_NOCB_CPU and rcu_nocbs=0-15 may be
related to the "Random Soft Lockup"... but not to "freezing while idle"
???
It seems that other crashes/lockups are trying to attach themselves to
this thread.
I note that this bug is asigned to platform_x86...@kernel-bugs.osdl.org.
This bug is very nearly 1 year old. Is this a good moment for the
assignee to address this thread and say:
* what, if any, Kernel issues have been identified
* what, if any, Kernel fixes have been applied
related to this thread.
If the root cause of (some or all of) the issues in this thread is fixed
or worked around by the "Typical Current Idle" BIOS option, does the
assignee think that this "bug" can now be closed, or are there actual
Kernel issues that remain, waiting to be fixed ?
Is it significant that W*nd*rs does not seem to suffer ?
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https://bugs.launchpad.net/bugs/1690085
Title:
Ryzen 1800X freeze - rcu_sched detected stalls on CPUs/tasks
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