On 13-Dec-18 4:59 AM, Tiwei Bie wrote:
On Tue, Dec 11, 2018 at 04:43:31PM +0000, Anatoly Burakov wrote:
When running in no-huge mode, we anonymously allocate our memory.
While this works for regular NICs and vdev's, it's not suitable
for memory sharing scenarios such as virtio with vhost_user
backend.
To fix this, allocate no-huge memory using memfd, and register
it with memalloc just like any other memseg fd. This will enable
using rte_memseg_get_fd() API with --no-huge EAL flag.
Signed-off-by: Anatoly Burakov <anatoly.bura...@intel.com>
---
Notes:
v2:
- Detect memfd support at compile time
- Change memfd-related log level to debug
doc/guides/rel_notes/release_19_02.rst | 5 +++
lib/librte_eal/linuxapp/eal/eal_memory.c | 54 +++++++++++++++++++++++-
2 files changed, 57 insertions(+), 2 deletions(-)
diff --git a/doc/guides/rel_notes/release_19_02.rst
b/doc/guides/rel_notes/release_19_02.rst
index 960098582..420d51b5b 100644
--- a/doc/guides/rel_notes/release_19_02.rst
+++ b/doc/guides/rel_notes/release_19_02.rst
@@ -23,6 +23,11 @@ DPDK Release 19.02
New Features
------------
+* **Support for using VirtIO without hugepages**
+
+ The --no-huge mode was augmented to use memfd-backed memory (on systems that
+ support memfd), to allow using VirtIO-based NICs without hugepages.
It would be better to say virtio-user here, because virtio NICs
e.g. the one emulated by QEMU, could be something quite different.
Thanks, will fix!
+
.. This section should contain new features added in this release.
Sample format:
[...]
--
Thanks,
Anatoly
