[dpdk-dev] [dpdk-users] IGB_UIO: PCI Resources Management

[Ferruh Yigit]

On 1/13/2017 1:51 AM, Tan, Jianfeng wrote:
> 
> 
>> -----Original Message-----
>> From: users [mailto:users-bounces at dpdk.org] On Behalf Of Ferruh Yigit
>> Sent: Thursday, January 12, 2017 8:22 PM
>> To: Alejandro Lucero
>> Cc: Gregory Etelson; dev; users at dpdk.org
>> Subject: Re: [dpdk-users] [dpdk-dev] IGB_UIO: PCI Resources Management
>>
>> On 1/12/2017 12:12 PM, Alejandro Lucero wrote:
>>>
>>>
>>> On Thu, Jan 12, 2017 at 11:55 AM, Ferruh Yigit <ferruh.yigit at intel.com
>>> <mailto:ferruh.yigit at intel.com>> wrote:
>>>
>>>     On 12/9/2016 8:54 AM, Gregory Etelson wrote:
>>>     > Hello,
>>>     >
>>>     > IGB_UIO driver does not close port PCI activities after DPDK process
>> exits.
>>>     > DPDK API provides rte_eth_dev_close() to manage port PCI,
>>>     > but it can be skipped if process receives SIGKILL signal
>>>
>>>     I guess I understand the problem.
>>>
>>>
>>> This is a known problem, but it is not just a UIO problem, and this
>>> patch does not solve it, maybe it just solves part of it.
>>>
>>> In fact, a DPDK program crashing could imply the NIC DMAing after that
>>> and after that memory was assigned to another program.
>>
>> Yes.
>> Can there be a way to stop NIC DMA, (or prevent it access to mem
>> anymore) when app crashes?
>> I think that is what this patch is looking for.
> 
> If I understand it correctly, you are looking for this patch?
> http://dpdk.org/dev/patchwork/patch/17495/
> 

That is good, thanks Jianfeng, I will check it.

btw, patch's current state is rejected, which is by mistake, it seems I
confused it with "iomem and ioport mapping" patch, sorry about it, I
will update its status immediately.