diff options
| author | Tao Cui <cuitao@kylinos.cn> | 2026-07-20 17:37:26 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2026-08-03 20:03:20 -0600 |
| commit | 482fc257de95ab181688e9d1dfcc6b6a58857b1e (patch) | |
| tree | b9d18cceac455517765cf1aff36799e190744d1c /block | |
| parent | 4e050c5b92c1600415b2cd452583e543036f3d73 (diff) | |
block/kyber-iosched: flush per-cpu latency buckets over possible CPUs
kyber_timer_fn() sums the per-cpu latency histograms with
for_each_online_cpu(). A CPU that goes offline mid-interval leaves its
bucket un-flushed; the samples are lost from the current decision and
re-appear (stale) when the CPU is onlined again.
Fixes: 6e25cb01ea20 ("kyber: implement improved heuristics")
Signed-off-by: Tao Cui <cuitao@kylinos.cn>
Reviewed-by: Yu Kuai <yukuai@fygo.io>
Link: https://patch.msgid.link/20260720093726.28965-5-cui.tao@linux.dev
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
| -rw-r--r-- | block/kyber-iosched.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/block/kyber-iosched.c b/block/kyber-iosched.c index 971818bcdc9d..2ee552ab8135 100644 --- a/block/kyber-iosched.c +++ b/block/kyber-iosched.c @@ -275,7 +275,7 @@ static void kyber_timer_fn(struct timer_list *t) bool bad = false; /* Sum all of the per-cpu latency histograms. */ - for_each_online_cpu(cpu) { + for_each_possible_cpu(cpu) { struct kyber_cpu_latency *cpu_latency; cpu_latency = per_cpu_ptr(kqd->cpu_latency, cpu); |