diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2025-11-17 17:13:09 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2025-11-17 17:13:09 +0100 |
| commit | 522fb20fbdbe48ed98f587d628637ff38ececd2d (patch) | |
| tree | a9886dd3993f7d068ff918ed166bf9832db5db30 | |
| parent | 3324b2180c17b21c31c16966cc85ca41a7c93703 (diff) | |
sched/fair: Have SD_SERIALIZE affect newidle balancing
Also serialize the possiblty much more frequent newidle balancing for
the 'expensive' domains that have SD_BALANCE set.
Initial benchmarking by K Prateek and Tim showed no negative effect.
Split out from the larger patch moving sched_balance_running around
for ease of bisect and such.
Suggested-by: Shrikanth Hegde <sshegde@linux.ibm.com>
Seconded-by: K Prateek Nayak <kprateek.nayak@amd.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/df068896-82f9-458d-8fff-5a2f654e8ffd@amd.com
Link: https://patch.msgid.link/6fed119b723c71552943bfe5798c93851b30a361.1762800251.git.tim.c.chen@linux.intel.com
# Conflicts:
# kernel/sched/fair.c
| -rw-r--r-- | kernel/sched/fair.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 59b17f09166b..071e07f8cb27 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -11732,7 +11732,7 @@ redo: goto out_balanced; } - if (!need_unlock && (sd->flags & SD_SERIALIZE) && idle != CPU_NEWLY_IDLE) { + if (!need_unlock && (sd->flags & SD_SERIALIZE)) { int zero = 0; if (!atomic_try_cmpxchg_acquire(&sched_balance_running, &zero, 1)) goto out_balanced; |