On 10/14/2014 10:50 AM, Tadeusz Struk wrote:
> On 10/14/2014 03:53 AM, Prarit Bhargava wrote:
>>>
>>> - node = adf_get_dev_node_id(pdev);
>>> - accel_dev = kzalloc_node(sizeof(*accel_dev), GFP_KERNEL, node);
>>> + if (num_possible_nodes() > 1 && dev_to_node(&pdev->dev) < 0) {
>>> + /* If the accelerator is connected to a node with no memory
>>> + * there is no point in using the accelerator since the remote
>>> + * memory transaction will be very slow. */
>>> + dev_err(&pdev->dev, "Invalid NUMA configuration.\n");
>>
>> This is a lot better. Thank you for taking my comments into account here.
>
> Thanks for taking the time to review my patch and providing your comments.
>
>>
>> Let's say I have a non-functional qat device and I see the above message in
>> the boot log. The log doesn't say what to do ... so perhaps change it to
>>
>> dev_err(&pdev->dev, FW_BUG "numa node is set to %d. This can be overridden by
>> using the numa_node module parameter.",
>> dev_to_node(&pdev->dev));
>>
>> and add a numa_node module parameter to let the user set that at module load
>> time in case their FW is broken? I've found that sysadmins are knowledgeable
>> about these types of things these days and are more than capable of looking
>> at sysfs and numactl to determine where a device is.
>>
>
> But then what if there are two devices and each belongs to different
> node. In this case we would fix one and break the other. I think if the
Oh, that's a really good point. But can you at least change the message to do a
FW_BUG and dump the node information? That would be useful for debugging.
P.
> FW is broken then using on core encryption will be safer. If a sysadmins
> is really knowledgeable, then she or he can change the code to customize
> it for a given platform and rebuild the module.
> Other than that as far as I know module parameters are not encouraged.
> T
>
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