diff options
Diffstat (limited to 'Documentation/cgroups')
| -rw-r--r-- | Documentation/cgroups/cgroups.txt | 4 | ||||
| -rw-r--r-- | Documentation/cgroups/cpuacct.txt | 2 | ||||
| -rw-r--r-- | Documentation/cgroups/cpusets.txt | 2 | ||||
| -rw-r--r-- | Documentation/cgroups/freezer-subsystem.txt | 4 | ||||
| -rw-r--r-- | Documentation/cgroups/memory.txt | 5 |
5 files changed, 10 insertions, 7 deletions
diff --git a/Documentation/cgroups/cgroups.txt b/Documentation/cgroups/cgroups.txt index 60d82e1..d3d5f3f 100644 --- a/Documentation/cgroups/cgroups.txt +++ b/Documentation/cgroups/cgroups.txt @@ -454,8 +454,8 @@ mounted hierarchy, to remove a task from its current cgroup you must move it into a new cgroup (possibly the root cgroup) by writing to the new cgroup's tasks file. -Note: If the ns cgroup is active, moving a process to another cgroup can -fail. +Note: Due to some restrictions enforced by some cgroup subsystems, moving +a process to another cgroup can fail. 2.3 Mounting hierarchies by name -------------------------------- diff --git a/Documentation/cgroups/cpuacct.txt b/Documentation/cgroups/cpuacct.txt index 3419707..e21a932 100644 --- a/Documentation/cgroups/cpuacct.txt +++ b/Documentation/cgroups/cpuacct.txt @@ -23,7 +23,7 @@ New accounting groups can be created under the parent group /sys/fs/cgroup. # cd /sys/fs/cgroup # mkdir g1 -# echo $$ > g1 +# echo $$ > g1/tasks The above steps create a new group g1 and move the current shell process (bash) into it. CPU time consumed by this bash and its children diff --git a/Documentation/cgroups/cpusets.txt b/Documentation/cgroups/cpusets.txt index 5b0d78e..5c51ed4 100644 --- a/Documentation/cgroups/cpusets.txt +++ b/Documentation/cgroups/cpusets.txt @@ -180,7 +180,7 @@ files describing that cpuset: - cpuset.sched_load_balance flag: if set, load balance within CPUs on that cpuset - cpuset.sched_relax_domain_level: the searching range when migrating tasks -In addition, the root cpuset only has the following file: +In addition, only the root cpuset has the following file: - cpuset.memory_pressure_enabled flag: compute memory_pressure? New cpusets are created using the mkdir system call or shell diff --git a/Documentation/cgroups/freezer-subsystem.txt b/Documentation/cgroups/freezer-subsystem.txt index c21d777..7e62de1 100644 --- a/Documentation/cgroups/freezer-subsystem.txt +++ b/Documentation/cgroups/freezer-subsystem.txt @@ -33,9 +33,9 @@ demonstrate this problem using nested bash shells: From a second, unrelated bash shell: $ kill -SIGSTOP 16690 - $ kill -SIGCONT 16990 + $ kill -SIGCONT 16690 - <at this point 16990 exits and causes 16644 to exit too> + <at this point 16690 exits and causes 16644 to exit too> This happens because bash can observe both signals and choose how it responds to them. diff --git a/Documentation/cgroups/memory.txt b/Documentation/cgroups/memory.txt index 06eb6d9..fd129f6 100644 --- a/Documentation/cgroups/memory.txt +++ b/Documentation/cgroups/memory.txt @@ -418,7 +418,6 @@ total_unevictable - sum of all children's "unevictable" # The following additional stats are dependent on CONFIG_DEBUG_VM. -inactive_ratio - VM internal parameter. (see mm/page_alloc.c) recent_rotated_anon - VM internal parameter. (see mm/vmscan.c) recent_rotated_file - VM internal parameter. (see mm/vmscan.c) recent_scanned_anon - VM internal parameter. (see mm/vmscan.c) @@ -441,6 +440,10 @@ Note: 5.3 swappiness Similar to /proc/sys/vm/swappiness, but affecting a hierarchy of groups only. +Please note that unlike the global swappiness, memcg knob set to 0 +really prevents from any swapping even if there is a swap storage +available. This might lead to memcg OOM killer if there are no file +pages to reclaim. Following cgroups' swappiness can't be changed. - root cgroup (uses /proc/sys/vm/swappiness). |