On 04/24/2015 03:24 PM, r...@redhat.com wrote:
From: Rik van Riel<r...@redhat.com>
Currently there is no way to query which CPUs are in nohz_full
mode from userspace.
Export the CPU list running in nohz_full mode in sysfs,
specifically in the file /sys/devices/system/cpu/nohz_full
This can be used by system management tools like libvirt,
openstack, and others to ensure proper task placement.
Signed-off-by: Rik van Riel<r...@redhat.com>
---
drivers/base/cpu.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
In the arch/tile distribution with our "dataplane" support, we have
traditionally had a /sys/devices/system/cpu/dataplane file with
the same semantics you are proposing. It's definitely helpful
to userspace applications figuring out how to appropriately take
over the machine they are being run on.
Acked-by: Chris Metcalf <cmetc...@ezchip.com>
--
Chris Metcalf, EZChip Semiconductor
http://www.ezchip.com
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