The CFS wakeup code will only ever go through EAS / its fast path on "regular" wakeups (i.e. not on forks or execs). These are currently gated by a check against 'sd_flag', which would be SD_BALANCE_WAKE at wakeup.
However, we now have a flag that explicitly tells us whether a wakeup is a "regular" one, so hinge those conditions on that flag instead. Signed-off-by: Valentin Schneider <[email protected]> --- kernel/sched/fair.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index c02f7af0a925..4f9ff5d85ab2 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -6684,7 +6684,7 @@ select_task_rq_fair(struct task_struct *p, int prev_cpu, int wake_flags) /* SD_flags and WF_flags share the first nibble */ int sd_flag = wake_flags & 0xF; - if (sd_flag & SD_BALANCE_WAKE) { + if (wake_flags & WF_TTWU) { record_wakee(p); if (sched_energy_enabled()) { @@ -6721,9 +6721,8 @@ select_task_rq_fair(struct task_struct *p, int prev_cpu, int wake_flags) if (unlikely(sd)) { /* Slow path */ new_cpu = find_idlest_cpu(sd, p, cpu, prev_cpu, sd_flag); - } else if (sd_flag & SD_BALANCE_WAKE) { /* XXX always ? */ + } else if (wake_flags & WF_TTWU) { /* XXX always ? */ /* Fast path */ - new_cpu = select_idle_sibling(p, prev_cpu, new_cpu); if (want_affine) -- 2.27.0
