v6 doesn't work here, things are going fine until online hotplugged
memory in guest.
steps:
1. qemu cmd:
./x86_64-softmmu/qemu-system-x86_64 -enable-kvm -m 512,maxmem=2G,slots=1 \
-hda /mnt/data/libvirt-images/hut-rhel6.3.img -L ../pc-bios-memhp/
(bios is from MST's acpi tree)
2. hot-plug a dimm:
device_adddimm,id=d0,size=1G
3. online hotplugged memory(in guest):
echo 'onlone' > /sys/devices/system/memory/memory/32/state
then after several seconds the console prints error messages like:
nommu_map_sg: overflow 107c15000+4096 of device mask ffffffff
ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
ata1.00: cmd ca/00:10:d0:0d:a4/00:00:00:00:00/e0 tag 0 dma 8192 out
res 50/00:00:08:09:e0/00:00:00:00:00/e0 Emask 0x40 (internal error)
ata1.00: configured for MWDMA2
ata1: EH complete
(repeat)
and can't do any disk I/O.
