Re: [PATCH 0/2] RFC: add -mem-shared option

[Paolo Bonzini]

On 29/11/19 11:13, Igor Mammedov wrote:
>> Agreed, mkstemp+shm_open seems better.  Perhaps this could be done in
>> hostmem-memfd.c though, basically as a fallback option?  In principle
>> one could even use getmntent to search for a hugetlbfs mount.
> So far fall backs proved to be a pain to deal with, as end users can't
> be sure what machine they are getting eventually.
> I'd prefer if we fail cleanly if asked config isn't possible and
> let user fix vm configuration instead.
> 

As far as I know memfd vs. mktemp+shm_open+shm_unlink is pretty much the
same thing.  memfd provide additional features such as sealing, but
unless someone explicitly checks for memfd features, the two should look
the same.

Paolo