[SLOF] [PATCH] virtio-net: rework the driver to support multiple open

Alexey Kardashevskiy aik at ozlabs.ru
Mon Aug 14 16:46:24 AEST 2017

On 03/08/17 20:14, Nikunj A Dadhania wrote:
> Found that virtio-net is using a around 200K receive buffer per device, if we
> connect more than 40 virtio-net devices the heap(8MB) gets over. Because of
> which allocation starts failing and the VM does not boot.
> Moreover, the driver did not support opening multiple device, which is possible
> using the OF client interface. As it was using globals to store the state
> information of the driver.
> Now the driver allocates a virtio_net structure during device open stage and
> fills in the state information. This details are used during various device
> functions and finally for cleaning up on close operation.
> Now as the buffer memory is allocated during open and freed during the close
> operations the heap usage is contained.
> Reported-by: Satheesh Rajendran <sathnaga at linux.vnet.ibm.com>
> Signed-off-by: Nikunj A Dadhania <nikunj at linux.vnet.ibm.com>

Thanks, applied.


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