Re: [Qemu-devel] [PATCH V6 0/7] nvdimm: guarantee persistence of QEMU writes to persistent memory

[Eduardo Habkost]

On Tue, Jun 12, 2018 at 01:38:08PM +0000, Junyan He wrote:
> He have pmem_persist and pmem_memcpy_persist stub functions.
> 
> If no libpmem and user really specify pmem=on, we just do nothing or just 
> memcpy.
> 
> Real persistent memory always require libpmem support its load/save.
> 
> If pmem=on and without libpmem, we can think that user want to imitate
> 
> pmem=on while the HW environment is without real persistent memory existing.
> 
> It may help debug on some machine without real pmem.

What exactly it would help debug?  Is there any difference
between testing the code with pmem=off and pmem=on if libptest is
unavailable?

I would prefer to simply not let the user set pmem=on if libptest
is not available.

-- 
Eduardo