[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 #7 from Nils Beyer <nbe at renzel.net> ---
FWIW, I also get MCA messages from the kernel, like this one:
---------------------------------------------------------------------------------
MCA: Bank 1, Status 0xd0200000000b0151
MCA: Global Cap 0x0000000000000117, Status 0x0000000000000000
MCA: Vendor "AuthenticAMD", ID 0x800f11, APIC ID 4
MCA: CPU 4 COR OVER ICACHE L1 IRD error

/var/log/messages.2.bz2:Jul 23 22:42:14 asbach kernel: MCA: Bank 1, Status
0x90200000000b0151
/var/log/messages.2.bz2:Jul 23 22:42:14 asbach kernel: MCA: Global Cap
0x0000000000000117, Status 0x0000000000000000
/var/log/messages.2.bz2:Jul 23 22:42:14 asbach kernel: MCA: Vendor
"AuthenticAMD", ID 0x800f11, APIC ID 13
/var/log/messages.2.bz2:Jul 23 22:42:14 asbach kernel: MCA: CPU 13 COR ICACHE
L1 IRD error

/var/log/messages.16.bz2:Jul  5 13:28:55 asbach kernel: MCA: Bank 1, Status
0x90200000000b0151
/var/log/messages.16.bz2:Jul  5 13:28:55 asbach kernel: MCA: Global Cap
0x0000000000000117, Status 0x0000000000000000
/var/log/messages.16.bz2:Jul  5 13:28:55 asbach kernel: MCA: Vendor
"AuthenticAMD", ID 0x800f11, APIC ID 14
/var/log/messages.16.bz2:Jul  5 13:28:55 asbach kernel: MCA: CPU 14 COR ICACHE
L1 IRD error

/var/log/messages.16.bz2:Jul  5 19:28:55 asbach kernel: MCA: Bank 1, Status
0x90200000000b0151
/var/log/messages.16.bz2:Jul  5 19:28:55 asbach kernel: MCA: Global Cap
0x0000000000000117, Status 0x0000000000000000
/var/log/messages.16.bz2:Jul  5 19:28:55 asbach kernel: MCA: Vendor
"AuthenticAMD", ID 0x800f11, APIC ID 10
/var/log/messages.16.bz2:Jul  5 19:28:55 asbach kernel: MCA: CPU 10 COR ICACHE
L1 IRD error

---------------------------------------------------------------------------------

CPU number is alway different; rest stays the same. I get these on another
Ryzen system, too. The latter one has ECC RAM and was assembled three months
after my first system...

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