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fix /sys/devices/system/cpu/online in cpuset not correct bug #305

merged 1 commit into from Sep 6, 2019


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commented Sep 6, 2019

When the container runs in cpuset and cpu quota, for example, cpu quota is limited to 8 cores, cpuset is limited to 1-3, 4-5, then there will be problems. The core number obtained by /proc/cpuinfo is 4 cores, and /sys /devices/system/cpu/online gets 8 cores.
The reason is that /sys/devices/system/cpu/online does not take into account the situation of cpuset. So submit this patch.

Test case:
docker run -it -d --cpuset-cpus="1-2,3-4" \ --cpu-period=100000 \ --cpu-quota=800000 \ --memory 2048m \ -v /root/tce/lxcfs/run/lxcfs/sys/devices/system/cpu/online:/sys/devices/system/cpu/online \ -v /root/tce/lxcfs/run/lxcfs/proc/cpuinfo:/proc/cpuinfo:rw \ debian:latest bash

Signed-off-by: Hongbo Yin

fix /sys/devices/system/cpu/online in cpuset not correct bug
Signed-off-by: Hongbo Yin <>

@brauner brauner merged commit 687eb38 into lxc:master Sep 6, 2019

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commented Sep 6, 2019


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