diff options
| author | Waiman Long <longman@redhat.com> | 2023-12-05 17:21:14 -0500 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2023-12-06 09:37:28 -1000 |
| commit | 3232e7aad11e541da86bbb1fa5ea5737b30bd006 (patch) | |
| tree | 51f9c0bdc14c47b8450051127459d9ba23a47fb5 /include/linux/sched | |
| parent | 77070eeb882124614a40616f01bfe60947be5778 (diff) | |
cgroup/cpuset: Include isolated cpuset CPUs in cpu_is_isolated() check
Currently, the cpu_is_isolated() function checks only the statically
isolated CPUs specified via the "isolcpus" and "nohz_full" kernel
command line options. This function is used by vmstat and memcg to
reduce interference with isolated CPUs by not doing stat flushing
or scheduling works on those CPUs.
Workloads running on isolated CPUs within isolated cpuset
partitions should receive the same treatment to reduce unnecessary
interference. This patch introduces a new cpuset_cpu_is_isolated()
function to be called by cpu_is_isolated() so that the set of dynamically
created cpuset isolated CPUs will be included in the check.
Assuming that testing a bit in a cpumask is atomic, no synchronization
primitive is currently used to synchronize access to the cpuset's
isolated_cpus mask.
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'include/linux/sched')
| -rw-r--r-- | include/linux/sched/isolation.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/sched/isolation.h b/include/linux/sched/isolation.h index fe1a46f30d24..2b461129d1fa 100644 --- a/include/linux/sched/isolation.h +++ b/include/linux/sched/isolation.h @@ -2,6 +2,7 @@ #define _LINUX_SCHED_ISOLATION_H #include <linux/cpumask.h> +#include <linux/cpuset.h> #include <linux/init.h> #include <linux/tick.h> @@ -67,7 +68,8 @@ static inline bool housekeeping_cpu(int cpu, enum hk_type type) static inline bool cpu_is_isolated(int cpu) { return !housekeeping_test_cpu(cpu, HK_TYPE_DOMAIN) || - !housekeeping_test_cpu(cpu, HK_TYPE_TICK); + !housekeeping_test_cpu(cpu, HK_TYPE_TICK) || + cpuset_cpu_is_isolated(cpu); } #endif /* _LINUX_SCHED_ISOLATION_H */ |