On 25 Jun 2014, at 18:44, Paolo Bonzini <pbonz...@redhat.com> wrote:
>> nregions: 4
>> region:
>> gpa = 0x100000000
>> size = 3221225472
>> ua = 0x2aab6ac00000
>
> High memory, above 3 gigabytes.
>
>> region:
>> gpa = 0xFFFC0000
>> size = 262144
>> ua = 0x7fc13d200000
>
> This is the BIOS. There shouldn't be any FD for this one, it
> is not allocated in hugetlbfs.
>
>> region:
>> gpa = 0x0
>> size = 655360
>> ua = 0x2aaaaac00000
>> region:
>> gpa = 0xC0000
>> size = 3220439040
>> ua = 0x2aaaaacc0000
>
> Together, it's the first 3 GB of memory.
>
> I understand now what you mean. Yeah, the format should be changed
> to include the offset (why does vhost-user need the ua at all?
> perhaps the offset can replace the ua).
>
>> BTW Any idea what to do with region 2, it doesn’t look like the one belonging
>> to the same place, but qemu_get_ram_fd() returns same FD for it.
>
> This must be a bug. I would have expected qemu_get_ram_fd to return -1
> here, so no descriptor should be passed to vhost-user.
Problem is inside qemu_get_ram_block():
if (block && addr - block->offset < block->length) {
goto found;
}
this is true if we have > 4G of RAM allocated.
Any advice how to fix this?
