On 3/9/19 3:07 PM, Appana Durga Kedareswara rao wrote: > While stress testing the CAN interface on xilinx axi can > in loopback mode getting message "write: no buffer space available" > Increasing device tx queue length resolved the above mentioned issue. No need to patch the kernel: $ ip link set <dev-name> txqueuelen 500 does the same thing. > > Signed-off-by: Appana Durga Kedareswara rao <appana.durga.rao@xxxxxxxxxx> > --- > --> Network devices default tx_queue_len is 1000 but for socket > can device it is 10 any reason for it?? > > drivers/net/can/dev.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/net/can/dev.c b/drivers/net/can/dev.c > index c05e4d5..32bd5be 100644 > --- a/drivers/net/can/dev.c > +++ b/drivers/net/can/dev.c > @@ -642,7 +642,7 @@ static void can_setup(struct net_device *dev) > dev->mtu = CAN_MTU; > dev->hard_header_len = 0; > dev->addr_len = 0; > - dev->tx_queue_len = 10; > + dev->tx_queue_len = 500; > > /* New-style flags. */ > dev->flags = IFF_NOARP; >
