| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.14 049/109] net: thunderx: Set max queue count taking XDP_TX into account | Date | Fri, 16 Mar 2018 16:23:18 +0100 |
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4.14-stable review patch. If anyone has any objections, please let me know.
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From: Sunil Goutham <sgoutham@cavium.com>
[ 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@cavium.com> Signed-off-by: cjacob <cjacob@caviumnetworks.com> Signed-off-by: Aleksey Makarov <aleksey.makarov@cavium.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- 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);
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