On 13 June 2018 at 04:16, Eitan Adler <lists_at_eitanadler.com> wrote: > On 13 June 2018 at 03:35, Konstantin Belousov <kostikbel_at_gmail.com> wrote: >> Today I noted that AMD published the public errata document for Ryzens, >> https://developer.amd.com/wp-content/resources/55449_1.12.pdf >> >> Some of the issues listed there looks quite relevant to the potential >> hangs that some people still experience with the machines. I wrote >> a script which should apply the recommended workarounds to the erratas >> that I find interesting. >> >> To run it, kldload cpuctl, then apply the latest firmware update to your >> CPU, then run the following shell script. Comments indicate the errata >> number for the workarounds. >> >> Please report the results. If the script helps, I will code the kernel >> change to apply the workarounds. >> >> #!/bin/sh >> >> # Enable workarounds for erratas listed in >> # https://developer.amd.com/wp-content/resources/55449_1.12.pdf >> >> # 1057, 1109 >> sysctl machdep.idle_mwait=0 >> sysctl machdep.idle=hlt > > > Is this needed if it was previously machdep.idle: acpi ? This might explain why I've never seen the lockup issues mentioned by other people. What would cause my machine to differ from others? -- Eitan AdlerReceived on Tue Jun 19 2018 - 03:44:46 UTC
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