Relateely I came across something called qemu-lite 
and It looks like a lighter qemu 
with many features compiled. Now QEMU+OSv runs in around 250ms.

 OSv v0.24-510-g451dc6d
4 CPUs detected
Firmware vendor: SeaBIOS
bsd: initializing - done
VFS: mounting ramfs at /
VFS: mounting devfs at /dev
net: initializing - done
vga: Add VGA device instance
virtio-blk: Add blk device instances 0 as vblk0, devsize=8520192
random: intel drng, rdrand registered as a source.
random: <Software, Yarrow> initialized
VFS: unmounting /dev
VFS: mounting rofs at /rofs
VFS: mounting devfs at /dev
VFS: mounting procfs at /proc
VFS: mounting ramfs at /tmp
disk read (real mode): 39.68ms, (+39.68ms)
uncompress lzloader.elf: 60.83ms, (+21.15ms)
TLS initialization: 61.42ms, (+0.59ms)
.init functions: 63.09ms, (+1.67ms)
SMP launched: 63.88ms, (+0.79ms)
VFS initialized: 66.43ms, (+2.55ms)
Network initialized: 66.87ms, (+0.44ms)
pvpanic done: 66.98ms, (+0.11ms)
pci enumerated: 72.82ms, (+5.84ms)
drivers probe: 72.82ms, (+0.00ms)
drivers loaded: 131.03ms, (+58.21ms)
ROFS mounted: 133.29ms, (+2.27ms)
Total time: 133.29ms, (+0.00ms)
Hello from C code
VFS: unmounting /dev
VFS: unmounting /proc
VFS: unmounting /
ROFS: spent 0.82 ms reading from disk
ROFS: read 21 512-byte blocks from disk
ROFS: allocated 18 512-byte blocks of cache memory
ROFS: hit ratio is 89.47%
Powering off.

real 0m0.266s
user 0m0.105s
sys 0m0.152s

Still 4 times slower than hyperkit on the same machine on OSX - please see 
my other email.


On Wednesday, April 11, 2018 at 12:29:37 PM UTC-4, Pekka Enberg wrote:
> Hi,
> On Wed, Apr 11, 2018 at 6:08 PM, Waldek Kozaczuk < 
> <javascript:>> wrote:
>> Do you know if kvmtool supports multiboot? If so which version?
> It does not support Multiboot at all. The main problem with booting OSv is 
> indeed the loading part. kvmtool on x86 only supports Linux bzImage. The 
> MIPS port supports ELF so perhaps that could be included for x86 to to boot 
> OSv.
> - Pekka 

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