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SubjectRe: [PATCH] net: can: Increase tx queue length
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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@xilinx.com>
> ---
> --> 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;
>

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