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[Qemu-devel] [PATCH v5 0/6] Add memfd memory backend
From: |
Marc-André Lureau |
Subject: |
[Qemu-devel] [PATCH v5 0/6] Add memfd memory backend |
Date: |
Mon, 23 Oct 2017 10:59:04 +0100 |
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.
Since Linux 4.14, memfd supports explicit hugetlb, however without
sealing.
v5:
- add memfd hugetlb support
- add seal and hugeltb options to memfd memory backend
- update qemu-option to explain sharing works with vhost-user for now
- rebased, misc code changes
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 (6):
memfd: split qemu_memfd_alloc()
memfd: remove needless include
memfd: add error argument, instead of perror()
memfd: add hugetlb support
Add memfd based hostmem
tests: use memfd in vhost-user-test
include/qemu/memfd.h | 4 +-
backends/hostmem-memfd.c | 124 +++++++++++++++++++++++++++++++++++++++++++++++
hw/virtio/vhost.c | 8 ++-
tests/vhost-user-test.c | 70 ++++++++++++++++----------
util/memfd.c | 101 ++++++++++++++++++++++----------------
backends/Makefile.objs | 2 +
qemu-options.hx | 15 ++++++
7 files changed, 256 insertions(+), 68 deletions(-)
create mode 100644 backends/hostmem-memfd.c
--
2.15.0.rc0.40.gaefcc5f6f