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SubjectRe: [PATCH] ACPI : Update platform device numa node based on _PXM method
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Hi Rafael,


On 03/28/2017 04:43 PM, Rafael J. Wysocki wrote:
> On Tuesday, March 21, 2017 09:54:30 AM Shanker Donthineni wrote:
>> The optional _PXM method evaluates to an integer that identifies the
>> proximity domain of a device object. This patch implements support for
>> ACPI _PXM method and updates the platform device numa node id using
>> acpi_get_node(), which provides the PXM to NUMA mapping information.
>>
>> Signed-off-by: Shanker Donthineni <shankerd@codeaurora.org>
> What exactly is the motivation here?

We have a couple of platform devices some of them are attached to socket0 and others to a different socket. We would like to covert memory allocations in Qualcomm platform device drivers to a NUMA aware allocation to improve performance.


>> ---
>> drivers/acpi/acpi_platform.c | 5 ++++-
>> 1 file changed, 4 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/acpi/acpi_platform.c b/drivers/acpi/acpi_platform.c
>> index b4c1a6a..83d953e 100644
>> --- a/drivers/acpi/acpi_platform.c
>> +++ b/drivers/acpi/acpi_platform.c
>> @@ -119,11 +119,14 @@ struct platform_device *acpi_create_platform_device(struct acpi_device *adev,
>> if (IS_ERR(pdev))
>> dev_err(&adev->dev, "platform device creation failed: %ld\n",
>> PTR_ERR(pdev));
>> - else
>> + else {
>> + set_dev_node(&pdev->dev, acpi_get_node(adev->handle));
>> dev_dbg(&adev->dev, "created platform device %s\n",
>> dev_name(&pdev->dev));
>> + }
>>
>> kfree(resources);
>> +
>> return pdev;
>> }
>> EXPORT_SYMBOL_GPL(acpi_create_platform_device);
>>

--
Shanker Donthineni
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.

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