[Bug 221029] AMD Ryzen: strange compilation failures using poudriere or plain buildkernel/buildworld

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=221029

--- Comment #8 from Nils Beyer <nbe at renzel.net> ---
Here are the MCA messages from my other Ryzen system (the one with ECC RAM):
------------------------------------------------------------------------------------------------
/var/log/messages.17.bz2:Jul  8 04:52:05 capetown kernel: MCA: Bank 1, Status
0x90200000000b0151
/var/log/messages.17.bz2:Jul  8 04:52:05 capetown kernel: MCA: Global Cap
0x0000000000000117, Status 0x0000000000000000
/var/log/messages.17.bz2:Jul  8 04:52:05 capetown kernel: MCA: Vendor
"AuthenticAMD", ID 0x800f11, APIC ID 10
/var/log/messages.17.bz2:Jul  8 04:52:05 capetown kernel: MCA: CPU 10 COR
ICACHE L1 IRD error

/var/log/messages.20.bz2:Jul  5 13:45:31 capetown kernel: MCA: Bank 1, Status
0x90200000000b0151
/var/log/messages.20.bz2:Jul  5 13:45:31 capetown kernel: MCA: Global Cap
0x0000000000000117, Status 0x0000000000000000
/var/log/messages.20.bz2:Jul  5 13:45:31 capetown kernel: MCA: Vendor
"AuthenticAMD", ID 0x800f11, APIC ID 10
/var/log/messages.20.bz2:Jul  5 13:45:31 capetown kernel: MCA: CPU 10 COR
ICACHE L1 IRD error
------------------------------------------------------------------------------------------------

these occured during buildkernel/buildworld compilation stress tests. I'll try
provoke some more; in order to get another core number...

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