[Qemu-devel] Memory: how to determine the max memory size of one VM?

[Zhi Yong Wu]

HI,

Today i tried to create one VM with the option "-m 4000", and found it
failed with the following errors:

Failed to allocate 4194304000 B: Cannot allocate memory
Aborted (core dumped)

I checked the qemu code, and found that in qemu_memalign() function,
posix_memalign() failed to allocate requested memory. Perhaps due to
No enough memory.

But when i tried with "-m 3000", it can work.

So i have one question about this. How to determine the supported max
memory size of one VM on one specifc host?

Can anyone elaborate it for me? thanks.



-- 
Regards,

Zhi Yong Wu