* /proc/pid/numa_maps no longer shows "default" policy
@ 2014-01-30 6:34 Anton Blanchard
2014-01-30 9:08 ` Mel Gorman
0 siblings, 1 reply; 2+ messages in thread
From: Anton Blanchard @ 2014-01-30 6:34 UTC (permalink / raw)
To: mgorman; +Cc: linux-mm
Hi Mel,
We recently noticed that /proc/pid/numa_maps used to show default
policy mappings as such:
cat /proc/self/numa_maps
00100000 default mapped=1 mapmax=339 active=0 N0=1
But now it shows them as prefer:X:
cat /proc/self/numa_maps
10000000 prefer:1 file=/usr/bin/cat mapped=1 N0=1
It looks like this was caused by 5606e387 (mm: numa: Migrate on
reference policy). I'm not sure if this is expected, but we don't have
CONFIG_NUMA_BALANCING enabled on ppc64 so I wasn't expecting processes
to have a particular node affinity by default.
Anton
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: /proc/pid/numa_maps no longer shows "default" policy
2014-01-30 6:34 /proc/pid/numa_maps no longer shows "default" policy Anton Blanchard
@ 2014-01-30 9:08 ` Mel Gorman
0 siblings, 0 replies; 2+ messages in thread
From: Mel Gorman @ 2014-01-30 9:08 UTC (permalink / raw)
To: Anton Blanchard; +Cc: linux-mm
On Thu, Jan 30, 2014 at 05:34:57PM +1100, Anton Blanchard wrote:
>
> Hi Mel,
>
> We recently noticed that /proc/pid/numa_maps used to show default
> policy mappings as such:
>
> cat /proc/self/numa_maps
> 00100000 default mapped=1 mapmax=339 active=0 N0=1
>
> But now it shows them as prefer:X:
>
> cat /proc/self/numa_maps
> 10000000 prefer:1 file=/usr/bin/cat mapped=1 N0=1
>
> It looks like this was caused by 5606e387 (mm: numa: Migrate on
> reference policy). I'm not sure if this is expected, but we don't have
> CONFIG_NUMA_BALANCING enabled on ppc64 so I wasn't expecting processes
> to have a particular node affinity by default.
>
https://lkml.org/lkml/2014/1/25/182
--
Mel Gorman
SUSE Labs
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