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    SubjectRe: [PATCH net-next] vmxnet3: Use single tx queue when CONFIG_PCI_MSI not defined

    Resending this patch with few changes.


    Avoid multiple queues when MSI or MSI-X not available

    Limit number of Tx queues to 1 if MSI/MSI-X support is not configured in
    the kernel. This will make number of tx and rx queues equal when MSI/X
    is not configured thus providing better performance.

    Signed-off-by: Bhavesh Davda <bhavesh@vmware.com>
    Signed-off-by: Shreyas N Bhatewara <sbhatewara@vmware.com>

    ---

    diff --git a/drivers/net/vmxnet3/vmxnet3_drv.c
    b/drivers/net/vmxnet3/vmxnet3_drv.c
    index 7a494f7..ab2e753 100644
    --- a/drivers/net/vmxnet3/vmxnet3_drv.c
    +++ b/drivers/net/vmxnet3/vmxnet3_drv.c
    @@ -2882,6 +2882,9 @@ vmxnet3_probe_device(struct pci_dev *pdev,
    int num_tx_queues;
    int num_rx_queues;

    + if (!pci_msi_enabled())
    + enable_mq = 0;
    +
    #ifdef VMXNET3_RSS
    if (enable_mq)
    num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES,
    diff --git a/drivers/net/vmxnet3/vmxnet3_int.h b/drivers/net/vmxnet3/vmxnet3_int.h
    index 8ba7b5f..f50d36f 100644
    --- a/drivers/net/vmxnet3/vmxnet3_int.h
    +++ b/drivers/net/vmxnet3/vmxnet3_int.h
    @@ -68,10 +68,10 @@
    /*
    * Version numbers
    */
    -#define VMXNET3_DRIVER_VERSION_STRING "1.0.25.0-k"
    +#define VMXNET3_DRIVER_VERSION_STRING "1.1.9.0-k"

    /* a 32-bit int, each byte encode a verion number in VMXNET3_DRIVER_VERSION */
    -#define VMXNET3_DRIVER_VERSION_NUM 0x01001900
    +#define VMXNET3_DRIVER_VERSION_NUM 0x01010900

    #if defined(CONFIG_PCI_MSI)
    /* RSS only makes sense if MSI-X is supported. */

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