This is a note to let you know that I've just added the patch titled net: thunderx: Set max queue count taking XDP_TX into account to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: net-thunderx-set-max-queue-count-taking-xdp_tx-into-account.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From foo@baz Fri Mar 16 15:43:17 CET 2018 From: Sunil Goutham <sgoutham@xxxxxxxxxx> Date: Fri, 24 Nov 2017 15:04:03 +0300 Subject: net: thunderx: Set max queue count taking XDP_TX into account From: Sunil Goutham <sgoutham@xxxxxxxxxx> [ Upstream commit 87de083857aa269fb171ef0b39696b2888361c58 ] on T81 there are only 4 cores, hence setting max queue count to 4 would leave nothing for XDP_TX. This patch fixes this by doubling max queue count in above scenarios. Signed-off-by: Sunil Goutham <sgoutham@xxxxxxxxxx> Signed-off-by: cjacob <cjacob@xxxxxxxxxxxxxxxxxx> Signed-off-by: Aleksey Makarov <aleksey.makarov@xxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/net/ethernet/cavium/thunder/nicvf_main.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/drivers/net/ethernet/cavium/thunder/nicvf_main.c +++ b/drivers/net/ethernet/cavium/thunder/nicvf_main.c @@ -1832,6 +1832,11 @@ static int nicvf_probe(struct pci_dev *p nic->pdev = pdev; nic->pnicvf = nic; nic->max_queues = qcount; + /* If no of CPUs are too low, there won't be any queues left + * for XDP_TX, hence double it. + */ + if (!nic->t88) + nic->max_queues *= 2; /* MAP VF's configuration registers */ nic->reg_base = pcim_iomap(pdev, PCI_CFG_REG_BAR_NUM, 0); Patches currently in stable-queue which might be from sgoutham@xxxxxxxxxx are queue-4.14/net-thunderx-set-max-queue-count-taking-xdp_tx-into-account.patch