On 03/28/2015 12:02 PM, Frederic Weisbecker wrote: > 2015-03-27 22:50 GMT+01:00 <r...@redhat.com>: >> From: Rik van Riel <r...@redhat.com> >> >> Currently there is no way to query which CPUs are in nohz_full >> mode from userspace. > > Well you can watch dmesg | grep NO_HZ > But surely sysfs is more convenient from an app. > > I guess it's ok, as long as it's strictly Read Only. Here it seems to > be the case. And it's not chmod'able, right?
I followed the other code for files in that directory. Quick testing shows that the cpu info files in /sys/devices/system/cpu are chmoddable, but writing to them fails with -EIO because there is no function set up to handle writes. So yeah, read only :) -- All rights reversed -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
