Comment # 4 on bug 1034357 from John Shand

Hardware event. This is not a software error.
mcelog[1020]: MCE 0
mcelog[1020]: CPU 0 BANK 4
mcelog[1020]: ADDR fea00040
mcelog[1020]: TIME 1492398286 Mon Apr 17 15:04:46 2017
mcelog[1020]:   MC4 Error: Watchdog timeout due to lack of progress.
mcelog[1020]:   cache level: generic, mem/io: generic, mem-tx: generic error, 

part-proc: generic participation (request timed out)

mcelog[1020]: STATUS b600000000070f0f MCGSTATUS 0
mcelog[1020]: MCGCAP 107 APICID 0 SOCKETID 0
mcelog[1020]: CPUID Vendor AMD Family 21 Model 3