> I don`t think that it could be ACPI-related in any way, instead, it > looks like race in vhost or simular mm-touching mechanism. The > repeated hits you mentioned should be fixed as well indeed, but they > can be barely the reason for this problem.
Please find a trace from a single dimm plugging in attached. The configuration is -m 512 + three 512-Mb dimms on start, then a 512-Mb dimm is plugged in, the NUMA topology is created with a single node0.
[ 94.751646] **** Context Switch from TID 4294967295 to TID 496836688 **** [ 94.755180] utils-0291 evaluate_integer : Return value [15] [ 94.757146] bus-0130 bus_get_status : Device [MP00] status [0000000f] [ 94.760755] acpi PNP0C80:00: Already enumerated [ 94.762478] utils-0291 evaluate_integer : Return value [15] [ 94.767924] bus-0130 bus_get_status : Device [MP01] status [0000000f] [ 94.770232] acpi PNP0C80:01: Already enumerated [ 94.771766] utils-0291 evaluate_integer : Return value [15] [ 94.773867] bus-0130 bus_get_status : Device [MP02] status [0000000f] [ 94.776149] acpi PNP0C80:02: Already enumerated [ 94.777678] utils-0291 evaluate_integer : Return value [15] [ 94.779669] bus-0130 bus_get_status : Device [MP03] status [0000000f] [ 94.782686] scan-1144 get_device_data : No context for object [ffff88001d83fe50] [ 94.785908] scan-1144 get_device_data : No context for object [ffff88001d83fe28] [ 94.789194] scan-1144 get_device_data : No context for object [ffff88001d83fe00] [ 94.792431] scan-1144 get_device_data : No context for object [ffff88001d83fdd8] [ 94.795605] scan-1144 get_device_data : No context for object [ffff88001d83fdb0] [ 94.798956] scan-1144 get_device_data : No context for object [ffff88001d83fd88] [ 94.802337] utils-0291 evaluate_integer : Return value [15] [ 94.804961] bus-0130 bus_get_status : Device [MP03] status [0000000f] [ 94.807953] device_pm-0128 device_get_power : Device [MP03] power state is D0 [ 94.811318] utils-0291 evaluate_integer : Return value [15] [ 94.814056] utils-0291 evaluate_integer : Return value [0] [ 94.816629] init_memory_mapping: [mem 0x160000000-0x17fffffff] [ 94.818714] [mem 0x160000000-0x17fffffff] page 2M [ 94.819539] [ffffea0004c00000-ffffea0004dfffff] PMD -> [ffff88001b800000-ffff88001b9fffff] on node 0 [ 94.823406] [ffffea0004e00000-ffffea0004ffffff] PMD -> [ffff88001aa00000-ffff88001abfffff] on node 0 [ 94.827062] [ffffea0005000000-ffffea00051fffff] PMD -> [ffff880000400000-ffff8800005fffff] on node 0
