On Fri, 07 Dec 2012 14:34:56 -0800
Davidlohr Bueso <davidlohr.bueso@xxxxxx> wrote:
> This patch adds a new 'memrange' file that shows the starting and
> ending physical addresses that are associated to a node. This is
> useful for identifying specific DIMMs within the system.
I was going to bug you about docmentation, but apparently we didn't
document /sys/devices/system/node/node*/. A great labor-saving device,
that!
> --- a/drivers/base/node.c
> +++ b/drivers/base/node.c
> @@ -211,6 +211,19 @@ static ssize_t node_read_distance(struct device *dev,
> }
> static DEVICE_ATTR(distance, S_IRUGO, node_read_distance, NULL);
>
> +static ssize_t node_read_memrange(struct device *dev,
> + struct device_attribute *attr, char *buf)
> +{
> + int nid = dev->id;
> + unsigned long start_pfn = NODE_DATA(nid)->node_start_pfn;
> + unsigned long end_pfn = start_pfn + NODE_DATA(nid)->node_spanned_pages;
hm. Is this correct for all for
FLATMEM/SPARSEMEM/SPARSEMEM_VMEMMAP/DISCONTIGME/etc?
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