Re: [Qemu-devel] vhost-user: broken mem regions

[Paolo Bonzini]

> 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.

Paolo