I am trying to make myself uncomfortable by thinking that this bug
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!!)
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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