If the NIC has a queue number larger than 128, then we need to change the ``MAX_QUEUES`` to a larger number to make sure we allocate a big enough memory pool for device setup.
Signed-off-by: Xiao Wang <xiao.w.w...@intel.com> --- doc/guides/sample_app_ug/vhost.rst | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/doc/guides/sample_app_ug/vhost.rst b/doc/guides/sample_app_ug/vhost.rst index 5e7f24c4e..88905e404 100644 --- a/doc/guides/sample_app_ug/vhost.rst +++ b/doc/guides/sample_app_ug/vhost.rst @@ -181,3 +181,13 @@ Common Issues * Failed to build DPDK in VM Make sure "-cpu host" QEMU option is given. + +* Device start fails if NIC's max queues > the default number of 128 + + mbuf pool size is dependent on the MAX_QUEUES configuration, if NIC's + max queue number is larger than 128, device start will fail due to + insufficient mbuf. + + Change the default number to make it work as below, just set the number + according to the NIC's property. + make EXTRA_CFLAGS="-DMAX_QUEUES=320" -- 2.15.1
