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Diffstat (limited to 'Documentation/admin-guide/cgroup-v2.rst')
| -rw-r--r-- | Documentation/admin-guide/cgroup-v2.rst | 30 |
1 files changed, 26 insertions, 4 deletions
diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst index bcc80269bb6a..c2a4b652bd1a 100644 --- a/Documentation/admin-guide/cgroup-v2.rst +++ b/Documentation/admin-guide/cgroup-v2.rst @@ -714,9 +714,7 @@ Conventions - Settings for a single feature should be contained in a single file. - The root cgroup should be exempt from resource control and thus - shouldn't have resource control interface files. Also, - informational files on the root cgroup which end up showing global - information available elsewhere shouldn't exist. + shouldn't have resource control interface files. - The default time unit is microseconds. If a different unit is ever used, an explicit unit suffix must be present. @@ -985,7 +983,7 @@ CPU Interface Files All time durations are in microseconds. cpu.stat - A read-only flat-keyed file which exists on non-root cgroups. + A read-only flat-keyed file. This file exists whether the controller is enabled or not. It always reports the following three stats: @@ -1329,6 +1327,10 @@ PAGE_SIZE multiple when read back. workingset_activate Number of refaulted pages that were immediately activated + workingset_restore + Number of restored pages which have been detected as an active + workingset before they got reclaimed. + workingset_nodereclaim Number of times a shadow node has been reclaimed @@ -1370,6 +1372,22 @@ PAGE_SIZE multiple when read back. The total amount of swap currently being used by the cgroup and its descendants. + memory.swap.high + A read-write single value file which exists on non-root + cgroups. The default is "max". + + Swap usage throttle limit. If a cgroup's swap usage exceeds + this limit, all its further allocations will be throttled to + allow userspace to implement custom out-of-memory procedures. + + This limit marks a point of no return for the cgroup. It is NOT + designed to manage the amount of swapping a workload does + during regular operation. Compare to memory.swap.max, which + prohibits swapping past a set amount, but lets the cgroup + continue unimpeded as long as other memory can be reclaimed. + + Healthy workloads are not expected to reach this limit. + memory.swap.max A read-write single value file which exists on non-root cgroups. The default is "max". @@ -1383,6 +1401,10 @@ PAGE_SIZE multiple when read back. otherwise, a value change in this file generates a file modified event. + high + The number of times the cgroup's swap usage was over + the high threshold. + max The number of times the cgroup's swap usage was about to go over the max boundary and swap allocation |