The default of 16 is too low for larger systems. Upper bound is the maximum number of fd's that can be passed to secondary process (253) and the maximum number of queue's allowed by Linux kernel (256). Both these manifest constants, are not exposed in visible kernel API.
Signed-off-by: Stephen Hemminger <step...@networkplumber.org> --- drivers/net/tap/meson.build | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/tap/meson.build b/drivers/net/tap/meson.build index 5e5a3ad3c6..4853efb236 100644 --- a/drivers/net/tap/meson.build +++ b/drivers/net/tap/meson.build @@ -14,7 +14,8 @@ sources = files( deps = ['bus_vdev', 'gso', 'hash'] -max_queues = '-DTAP_MAX_QUEUES=16' +# TAP device is limited by RTE_MP_MAX_FD_NUM +max_queues = '-DTAP_MAX_QUEUES=253' cflags += max_queues require_iova_in_mbuf = false -- 2.45.2
