diff options
Diffstat (limited to 'library/std/src/thread')
| -rw-r--r-- | library/std/src/thread/mod.rs | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/library/std/src/thread/mod.rs b/library/std/src/thread/mod.rs index d28c7b58b20..44c8a50fd86 100644 --- a/library/std/src/thread/mod.rs +++ b/library/std/src/thread/mod.rs @@ -1577,10 +1577,15 @@ fn _assert_sync_and_send() { /// /// On Linux: /// - It may overcount the amount of parallelism available when limited by a -/// process-wide affinity mask or cgroup quotas and cgroup2 fs or `sched_getaffinity()` can't be +/// process-wide affinity mask or cgroup quotas and `sched_getaffinity()` or cgroup fs can't be /// queried, e.g. due to sandboxing. /// - It may undercount the amount of parallelism if the current thread's affinity mask /// does not reflect the process' cpuset, e.g. due to pinned threads. +/// - If the process is in a cgroup v1 cpu controller, this may need to +/// scan mountpoints to find the corresponding cgroup v1 controller, +/// which may take time on systems with large numbers of mountpoints. +/// (This does not apply to cgroup v2, or to processes not in a +/// cgroup.) /// /// On all targets: /// - It may overcount the amount of parallelism available when running in a VM |