[dpdk-dev] [PATCH RFC 0/3] only call iopl when necessary

[David Marchand]

Hello,

On Wed, Aug 27, 2014 at 11:22 AM, Xie, Huawei <huawei.xie at intel.com> wrote:

> Hi David:
> The reason iopl is put in rte_eal_init is that we want all later created
> DPDK processes/threads inherit the iopl permission.
> If you only call iopl in pmd_init, RX/TX and other threads which needs io
> permission will segmentation fault.
>

rte_virtio_pmd_init() is the constructor that registers the virtio pmd in
the driver list.
It is called from rte_eal_dev_init() in rte_eal_init().
So it means my patch only moved the call to iopl() a little later in
rte_eal_init() and this is still before any thread has been created.

I can't see why this would cause a problem.


-- 
David Marchand