what difference bettween /sys/fs/cgroup/systemd/ && /sys/fs/cgroup/xxx/












4















I know that ./systemd-219/src/core/mount-setup.c define some cgroup mount path .



But I do not know why systemd create directory /sys/fs/cgroup/systemd/ and what's difference between /sys/fs/cgroup/systemd/ and /sys/fs/cgroup/memory/?



Is /sys/fs/cgroup/systemd/ mount path just mean default cgroup path?



#ll /sys/fs/cgroup/systemd/
total 0
-rw-r--r-- 1 root root 0 Jul 6 2017 cgroup.clone_children
--w--w--w- 1 root root 0 Jul 6 2017 cgroup.event_control
-rw-r--r-- 1 root root 0 Jul 6 15:24 cgroup.procs
-r--r--r-- 1 root root 0 Jul 6 2017 cgroup.sane_behavior
drwxr-xr-x 3 root root 0 Jul 6 15:23 docker.slice
-rw-r--r-- 1 root root 0 Jul 6 2017 notify_on_release
-rw-r--r-- 1 root root 0 Jul 6 2017 release_agent
drwxr-xr-x 65 root root 0 Jul 6 15:38 system.slice
-rw-r--r-- 1 root root 0 Jul 6 2017 tasks
drwxr-xr-x 4 root root 0 Jul 6 21:18 user.slice









share|improve this question
















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    4















    I know that ./systemd-219/src/core/mount-setup.c define some cgroup mount path .



    But I do not know why systemd create directory /sys/fs/cgroup/systemd/ and what's difference between /sys/fs/cgroup/systemd/ and /sys/fs/cgroup/memory/?



    Is /sys/fs/cgroup/systemd/ mount path just mean default cgroup path?



    #ll /sys/fs/cgroup/systemd/
    total 0
    -rw-r--r-- 1 root root 0 Jul 6 2017 cgroup.clone_children
    --w--w--w- 1 root root 0 Jul 6 2017 cgroup.event_control
    -rw-r--r-- 1 root root 0 Jul 6 15:24 cgroup.procs
    -r--r--r-- 1 root root 0 Jul 6 2017 cgroup.sane_behavior
    drwxr-xr-x 3 root root 0 Jul 6 15:23 docker.slice
    -rw-r--r-- 1 root root 0 Jul 6 2017 notify_on_release
    -rw-r--r-- 1 root root 0 Jul 6 2017 release_agent
    drwxr-xr-x 65 root root 0 Jul 6 15:38 system.slice
    -rw-r--r-- 1 root root 0 Jul 6 2017 tasks
    drwxr-xr-x 4 root root 0 Jul 6 21:18 user.slice









    share|improve this question
















    bumped to the homepage by Community 14 mins ago


    This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.


















      4












      4








      4








      I know that ./systemd-219/src/core/mount-setup.c define some cgroup mount path .



      But I do not know why systemd create directory /sys/fs/cgroup/systemd/ and what's difference between /sys/fs/cgroup/systemd/ and /sys/fs/cgroup/memory/?



      Is /sys/fs/cgroup/systemd/ mount path just mean default cgroup path?



      #ll /sys/fs/cgroup/systemd/
      total 0
      -rw-r--r-- 1 root root 0 Jul 6 2017 cgroup.clone_children
      --w--w--w- 1 root root 0 Jul 6 2017 cgroup.event_control
      -rw-r--r-- 1 root root 0 Jul 6 15:24 cgroup.procs
      -r--r--r-- 1 root root 0 Jul 6 2017 cgroup.sane_behavior
      drwxr-xr-x 3 root root 0 Jul 6 15:23 docker.slice
      -rw-r--r-- 1 root root 0 Jul 6 2017 notify_on_release
      -rw-r--r-- 1 root root 0 Jul 6 2017 release_agent
      drwxr-xr-x 65 root root 0 Jul 6 15:38 system.slice
      -rw-r--r-- 1 root root 0 Jul 6 2017 tasks
      drwxr-xr-x 4 root root 0 Jul 6 21:18 user.slice









      share|improve this question
















      I know that ./systemd-219/src/core/mount-setup.c define some cgroup mount path .



      But I do not know why systemd create directory /sys/fs/cgroup/systemd/ and what's difference between /sys/fs/cgroup/systemd/ and /sys/fs/cgroup/memory/?



      Is /sys/fs/cgroup/systemd/ mount path just mean default cgroup path?



      #ll /sys/fs/cgroup/systemd/
      total 0
      -rw-r--r-- 1 root root 0 Jul 6 2017 cgroup.clone_children
      --w--w--w- 1 root root 0 Jul 6 2017 cgroup.event_control
      -rw-r--r-- 1 root root 0 Jul 6 15:24 cgroup.procs
      -r--r--r-- 1 root root 0 Jul 6 2017 cgroup.sane_behavior
      drwxr-xr-x 3 root root 0 Jul 6 15:23 docker.slice
      -rw-r--r-- 1 root root 0 Jul 6 2017 notify_on_release
      -rw-r--r-- 1 root root 0 Jul 6 2017 release_agent
      drwxr-xr-x 65 root root 0 Jul 6 15:38 system.slice
      -rw-r--r-- 1 root root 0 Jul 6 2017 tasks
      drwxr-xr-x 4 root root 0 Jul 6 21:18 user.slice






      systemd






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      share|improve this question








      edited Jul 8 '17 at 8:49









      Ortomala Lokni

      2,19011442




      2,19011442










      asked Jul 6 '17 at 13:21









      穆阿浩穆阿浩

      106315




      106315





      bumped to the homepage by Community 14 mins ago


      This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.







      bumped to the homepage by Community 14 mins ago


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          Systemd 219 uses the Linux kernel cgroup v1 feature and mounts multiple hierarchies under /sys/fs/cgroup, some for controllers, some without.



          /sys/fs/cgroup/systemd is a hierarchy without croup controllers, just for systemd usage (tracking which processes are part of which cgroups).



          This will change once the migration to cgroup v2 is complete and there will be only one cgroup hierarchy (unified hierarchy).






          share|improve this answer























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            Systemd 219 uses the Linux kernel cgroup v1 feature and mounts multiple hierarchies under /sys/fs/cgroup, some for controllers, some without.



            /sys/fs/cgroup/systemd is a hierarchy without croup controllers, just for systemd usage (tracking which processes are part of which cgroups).



            This will change once the migration to cgroup v2 is complete and there will be only one cgroup hierarchy (unified hierarchy).






            share|improve this answer




























              0














              Systemd 219 uses the Linux kernel cgroup v1 feature and mounts multiple hierarchies under /sys/fs/cgroup, some for controllers, some without.



              /sys/fs/cgroup/systemd is a hierarchy without croup controllers, just for systemd usage (tracking which processes are part of which cgroups).



              This will change once the migration to cgroup v2 is complete and there will be only one cgroup hierarchy (unified hierarchy).






              share|improve this answer


























                0












                0








                0







                Systemd 219 uses the Linux kernel cgroup v1 feature and mounts multiple hierarchies under /sys/fs/cgroup, some for controllers, some without.



                /sys/fs/cgroup/systemd is a hierarchy without croup controllers, just for systemd usage (tracking which processes are part of which cgroups).



                This will change once the migration to cgroup v2 is complete and there will be only one cgroup hierarchy (unified hierarchy).






                share|improve this answer













                Systemd 219 uses the Linux kernel cgroup v1 feature and mounts multiple hierarchies under /sys/fs/cgroup, some for controllers, some without.



                /sys/fs/cgroup/systemd is a hierarchy without croup controllers, just for systemd usage (tracking which processes are part of which cgroups).



                This will change once the migration to cgroup v2 is complete and there will be only one cgroup hierarchy (unified hierarchy).







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Mar 11 '18 at 10:53









                SiosmSiosm

                639612




                639612






























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