mm/damon: document that a zero sample_interval is accepted

damon_set_attrs() accepts sample_interval == 0.  This was reported as a
bug in v1 of this patch (rejecting it in damon_set_attrs()).  A similar
patch was already declined for the same reason: a zero interval is
intentionally supported [1].

Document the behavior instead of changing it.

Link: https://lore.kernel.org/20260921151547.78472-5-sj@kernel.org
Link: https://lore.kernel.org/all/20260722094304.3132750-1-dayou5941@163.com/ [1]
Signed-off-by: Karthikeyan KS <karthiproffesional@gmail.com>
Signed-off-by: SJ Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: SJ Park <sj@kernel.org>
Cc: Adrian Huang <adrianhuang0701@gmail.com>
Cc: Liew Rui Yan <aethernet65535@gmail.com>
Cc: Xuewen Wang <wangxuewen@kylinos.cn>
Cc: Zenghui Yu (Huawei) <zenghui.yu@linux.dev>
This commit is contained in:
Karthikeyan KS 2026-09-21 08:15:46 -07:00 committed by Andrew Morton
parent 76ba2763d5
commit 6fbcf40619

View File

@ -836,7 +836,8 @@ struct damon_probe {
/**
* struct damon_attrs - Monitoring attributes for accuracy/overhead control.
*
* @sample_interval: The time between access samplings.
* @sample_interval: The time between access samplings. Zero is
* accepted.
* @aggr_interval: The time between monitor results aggregations.
* @ops_update_interval: The time between monitoring operations updates.
* @intervals_goal: Intervals auto-tuning goal.