Re: [Xen-devel] [PATCH 1/1] xen-netfront: limit max queues number to online cpus

[Joe Jin <joe.jin@xxxxxxxxxx>]

We need to take care sysfs too, please ignore this patch, I'll create
new one later for review and comment.

Thanks,
Joe
On 10/23/2015 08:50 AM, Joe Jin wrote:
> Should not allocate queues number more than online cpus.
> 
> Signed-off-by: Joe Jin <joe.jin@xxxxxxxxxx>
> Cc: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
> Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
> Cc: David S. Miller <davem@xxxxxxxxxxxxx>
> ---
>  drivers/net/xen-netfront.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c
> index f821a97..1eebd4e 100644
> --- a/drivers/net/xen-netfront.c
> +++ b/drivers/net/xen-netfront.c
> @@ -2137,7 +2137,7 @@ static int __init netif_init(void)
>       /* Allow as many queues as there are CPUs if user has not
>        * specified a value.
>        */
> -     if (xennet_max_queues == 0)
> +     if (xennet_max_queues == 0 || xennet_max_queues > num_online_cpus())
>               xennet_max_queues = num_online_cpus();
>  
>       return xenbus_register_frontend(&netfront_driver);
> 

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