From: Andrew Morton <akpm@linux-foundation.org>
To: Davidlohr Bueso <davidlohr.bueso@hp.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH] mm: add node physical memory range to sysfs
Date: Fri, 7 Dec 2012 15:51:25 -0800 [thread overview]
Message-ID: <20121207155125.d3117244.akpm@linux-foundation.org> (raw)
In-Reply-To: <1354919696.2523.6.camel@buesod1.americas.hpqcorp.net>
On Fri, 07 Dec 2012 14:34:56 -0800
Davidlohr Bueso <davidlohr.bueso@hp.com> 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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next prev parent reply other threads:[~2012-12-07 23:51 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-07 22:34 [PATCH] mm: add node physical memory range to sysfs Davidlohr Bueso
2012-12-07 23:51 ` Andrew Morton [this message]
2012-12-08 0:17 ` Dave Hansen
2012-12-13 1:18 ` Davidlohr Bueso
2012-12-13 1:48 ` Dave Hansen
2012-12-13 2:03 ` Davidlohr Bueso
2012-12-13 4:49 ` Dave Hansen
2012-12-13 15:17 ` KOSAKI Motohiro
2012-12-13 23:15 ` Davidlohr Bueso
2012-12-14 0:18 ` Dave Hansen
2012-12-08 19:45 ` Greg Kroah-Hartman
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