I am trying to make myself uncomfortable by thinking that this bug
https://bugzilla.kernel.org/show_bug.cgi?id=196683
has to be fixed, so that we don't have to fiddle around with the BIOS settings.
Those who are interested can also take a look at the Ryzen errata (50+Pages!!)
https://developer.amd.com/wp-content...55449_1.12.pdf
In the errata pages, AMD provides a bunch of "Suggested Workaround", that system software is supposed to do..
The revision history says, that 1.12 is the one that made it to the public & on June..
So I hope a lot of kernel fixes/work-arounds are yet to come..
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Some FreeBSD Users Are Still Running Into Random Lock-Ups With Ryzen
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Originally posted by Shinobi View PostIs the "Ryzen lock up issue(that gets fixed by disabling C-state)" ? still wide-spread ?
Is the same problem still present in the Ryzen 2+Vega combo series of chips also ?
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Is the "Ryzen lock up issue(that gets fixed by disabling C-state)" ? still wide-spread ?
Is the same problem still present in the Ryzen 2+Vega combo series of chips also ?
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Originally posted by Apteryx View Post
Are you also running with C-State disabled in UEFI? I also still had crashes with the CONFIG_RCU_NOCB_CPU workaround (thanks for discovering it). But it doesn't mean that C-State alone is the cure: I also had crashes with C-State off but *without* the CONFIG_RCU_NOCB_CPU hack. At this point I'm throwing everything I can at the problem, so ASLR is off, C-State is off, opcache is off and using CONFIG_RCU_NOCB_CPU. It seems to be holding that way -- touching wood.
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Originally posted by Apteryx View Post
Probably true, but having a UPS doesn't fix the Ryzen soft lock problem. I tested 3 different systems equipped with 1800X and 1700X CPUs, two of which are plugged onto a commercial grade UPS and they crash all the same.
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I get the random lockup issue more often with the Nouveau driver than with nVidia drivers. I think Nouveau does something that tends to provoke it.
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Originally posted by typerrrrrrrr View PostForcing off the C6 states (https://github.com/r4m0n/ZenStates-Linux) with a script in /etc/rc.local has changed my setup from having an average uptime of 1 - 1.5 days into 50+ days (generally I've rebooted for other reasons so haven't gone beyond that number). Every other attempted fix (RCU, randomizing VA space, etc) had nearly zero effect.
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Originally posted by monraaf View Post
This was fixed in 4.13rc-something. These soft-lockups have been visible on large SPARC machines as well. This issue is not specific to Ryzen/Threadripper.
My office has one Threadripper machine which had this issue as well. With the updated kernel, the problem went away.
The machine is running 24/7 and is used for heavy number crunching.
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Originally posted by shmerl View PostRyzen is very sensitive to power stability. In short, you need UPS to avoid problems.
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