[172804.779162] RAS: Soft-offlining pfn: 0x552c1a
[172804.780469] mce: [Hardware Error]: Machine check events logged
[172804.780471] EDAC sbridge MC0: HANDLING MCE MEMORY ERROR
[172804.780472] EDAC sbridge MC0: CPU 0: Machine Check Event: 0 Bank 5: 8c00004000010091
[172804.780473] EDAC sbridge MC0: TSC 15915514fa5dd
[172804.780473] EDAC sbridge MC0: ADDR 552c1ae00
[172804.780474] EDAC sbridge MC0: MISC 2140444486
[172804.780475] EDAC sbridge MC0: PROCESSOR 0:206d7 TIME 1563882597 SOCKET 0 APIC 0
[172804.780487] EDAC MC0: 1 CE memory read error on CPU_SrcID#0_Ha#0_Chan#1_DIMM#0 (channel:1 slot:0 page:0x552c1a offset:0xe00 grain:32 syndrome:0x0 - area:DRAM err_code:0001:0091 socket:0 ha:0 channel_mask:2 rank:1)
oh dear