Re: [Qemu-devel] [PATCH v4 0/3] Add memfd memory backend

[David Hildenbrand]

On 21.06.2017 16:02, Marc-André Lureau wrote:
> Add a new Linux-specific memory backend, similar to hostmem-file,
> except that it doesn't need file path. It also try to enforce memory
> sealing if available. It is thus slightly easier and secure, and is
> compatible with transparent huge-pages since Linux 4.8.
> 
> v4:
> - rebased, now that preliminary patches are merged
> 
> v3:
> - make vhost-user-test use memfd only if possible
> - rebased
> 
> v1->v2:
> - make it linux-specific
> - minor changes and commit message tweaks
> 
> Marc-André Lureau (3):
>   memfd: split qemu_memfd_alloc()
>   Add memfd based hostmem
>   tests: use memfd in vhost-user-test
> 
>  include/qemu/memfd.h     |  2 ++
>  backends/hostmem-memfd.c | 67 +++++++++++++++++++++++++++++++++++++++++++++++
>  tests/vhost-user-test.c  | 68 
> +++++++++++++++++++++++++++++++-----------------
>  util/memfd.c             | 42 ++++++++++++++++++------------
>  backends/Makefile.objs   |  2 ++
>  qemu-options.hx          | 11 ++++++++
>  6 files changed, 151 insertions(+), 41 deletions(-)
>  create mode 100644 backends/hostmem-memfd.c
> 

Just wondering if it would make more sense to add a new parameter to the
ram backend. Sorry if this has already been discussed.

-- 

Thanks,

David