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doc: add note for vhost builtin example

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Add memory pre-allocation note for vhost example when enabling
"builtin-net-driver".

Signed-off-by: Xuan Ding <xuan.ding@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
This commit is contained in:
Xuan Ding 2020-03-25 04:21:15 +00:00 committed by Ferruh Yigit
parent e60b10f260
commit b1692872aa
1 changed files with 7 additions and 0 deletions
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7
doc/guides/sample_app_ug/vhost.rst
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@ -201,3 +201,10 @@ Common Issues
QEMU vhost net device start will fail if protocol feature is not negotiated.
DPDK virtio-user pmd can be the replacement of QEMU.
* Device start fails when enabling "builtin-net-driver" without memory
pre-allocation
The builtin example doesn't support dynamic memory allocation. When vhost
backend enables "builtin-net-driver", "--socket-mem" option should be
added at virtio-user pmd side as a startup item.