Merge: cgroup: Remove steal time from usage_usec

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/merge_requests/6423

JIRA: https://issues.redhat.com/browse/RHEL-79933

commit db5fd3c
Author: Muhammad Adeel <[email protected]>
Date:   Fri, 7 Feb 2025 14:24:32 +0000

    cgroup: Remove steal time from usage_usec

    The CPU usage time is the time when user, system or both are using the CPU.
    Steal time is the time when CPU is waiting to be run by the Hypervisor. It
    should not be added to the CPU usage time, hence removing it from the
    usage_usec entry.

    Fixes: 936f2a7 ("cgroup: add cpu.stat file to root cgroup")
    Acked-by: Axel Busch <[email protected]>
    Acked-by: Michal Koutný <[email protected]>
    Signed-off-by: Muhammad Adeel <[email protected]>
    Signed-off-by: Tejun Heo <[email protected]>

Signed-off-by: Waiman Long <[email protected]>

Approved-by: Thomas Huth <[email protected]>
Approved-by: Radostin Stoyanov <[email protected]>
Approved-by: Phil Auld <[email protected]>
Approved-by: CKI KWF Bot <[email protected]>

Merged-by: Augusto Caringi <[email protected]>

Author: caringi

kernel/cgroup/rstat.c

@@ -586,7 +586,6 @@ static void root_cgroup_cputime(struct cgroup_base_stat *bstat)
 
 		cputime->sum_exec_runtime += user;
 		cputime->sum_exec_runtime += sys;
-		cputime->sum_exec_runtime += cpustat[CPUTIME_STEAL];
 
 #ifdef CONFIG_SCHED_CORE
 		bstat->forceidle_sum += cpustat[CPUTIME_FORCEIDLE];