Commit 5ebec443fb96a ("sched_ext: Exit dispatch and move operations
immediately when aborting") replaced the breather mechanism with the
scx_aborting flag.
Update comments removing references to the breather mechanism to avoid
confusion.
Signed-off-by: Andrea Righi <arighi@nvidia.com>
---
kernel/sched/ext.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c
index c900667b25b88..8a3b8f64a06be 100644
--- a/kernel/sched/ext.c
+++ b/kernel/sched/ext.c
@@ -3732,7 +3732,7 @@ bool scx_rcu_cpu_stall(void)
* live-lock the system by making many CPUs target the same DSQ to the point
* where soft-lockup detection triggers. This function is called from
* soft-lockup watchdog when the triggering point is close and tries to unjam
- * the system by enabling the breather and aborting the BPF scheduler.
+ * the system and aborting the BPF scheduler.
*/
void scx_softlockup(u32 dur_s)
{
@@ -4315,9 +4315,9 @@ static bool scx_claim_exit(struct scx_sched *sch, enum scx_exit_kind kind)
return false;
/*
- * Some CPUs may be trapped in the dispatch paths. Enable breather
- * immediately; otherwise, we might not even be able to get to
- * scx_bypass().
+ * Some CPUs may be trapped in the dispatch paths. Set the aborting
+ * flag to break potential live-lock scenarios, ensuring we can
+ * successfully reach scx_bypass().
*/
WRITE_ONCE(scx_aborting, true);
return true;
--
2.51.2