I'm using seabios 1.7.5-0 for kvm ,and I find some problem when using windows
7 64bit bandvirtual machine.If I configure the windows 7 64bit vm memory to 8GB
,the vm can't boot up very often(some win7-64bit version easy to trigger) .I
use trace-cmd tool to trace it ,the vm just scan from last ram of below
4G(0xc000_0000) to 4G address byte by byte.This is very time-consuming.From
E820 table,the address range contain nothing(it is an address hole).
I query clue from seabios because I can't find any problems in kvm or qemu.
seabios keep a range of ram from last address below 4G as zonehigh ram .I
guess the windows os see a not aligned ram address space and scan from
0xc000_0000. so I try to change the ZoneHigh to low address space (I choose
128MB,grub use from 1MB address space).after I changed,I can boot win7-64bit vm
normally.
So I want to know whether changing ZoneHigh to 128MB can be a general
modification.
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