From: Chen Ridong <chenridong@huaweicloud.com>
To: mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com,
vincent.guittot@linaro.org, dietmar.eggemann@arm.com,
rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de,
bristot@redhat.com, vschneid@redhat.com, rafael@kernel.org,
pavel@ucw.cz
Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
lujialin4@huawei.com, chenridong@huawei.com
Subject: [PATCH 6.6 4/5] freezer,sched: Clean saved_state when restoring it during thaw
Date: Mon, 28 Jul 2025 02:41:20 +0000 [thread overview]
Message-ID: <20250728024121.33864-5-chenridong@huaweicloud.com> (raw)
In-Reply-To: <20250728024121.33864-1-chenridong@huaweicloud.com>
From: Elliot Berman <quic_eberman@quicinc.com>
[ Upstream commit 418146e39891ef1fb2284dee4cabbfe616cd21cf ]
Clean saved_state after using it during thaw. Cleaning the saved_state
allows us to avoid some unnecessary branches in ttwu_state_match.
Signed-off-by: Elliot Berman <quic_eberman@quicinc.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20231120-freezer-state-multiple-thaws-v1-2-f2e1dd7ce5a2@quicinc.com
Signed-off-by: Chen Ridong <chenridong@huawei.com>
---
kernel/freezer.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/kernel/freezer.c b/kernel/freezer.c
index 759006a9a910..f57aaf96b829 100644
--- a/kernel/freezer.c
+++ b/kernel/freezer.c
@@ -187,6 +187,7 @@ static int __restore_freezer_state(struct task_struct *p, void *arg)
if (state != TASK_RUNNING) {
WRITE_ONCE(p->__state, state);
+ p->saved_state = TASK_RUNNING;
return 1;
}
--
2.34.1
next prev parent reply other threads:[~2025-07-28 2:55 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <2025072421-deviate-skintight-bbd5@gregkh>
2025-07-28 2:41 ` [PATCH 6.6 0/5] [Backport] sched,freezer: Remove unnecessary warning in __thaw_task Chen Ridong
2025-07-28 2:41 ` [PATCH 6.6 1/5] sched/core: Remove ifdeffery for saved_state Chen Ridong
2025-07-28 2:41 ` [PATCH 6.6 2/5] freezer,sched: Use saved_state to reduce some spurious wakeups Chen Ridong
2025-07-28 2:41 ` [PATCH 6.6 3/5] freezer,sched: Do not restore saved_state of a thawed task Chen Ridong
2025-07-28 2:41 ` Chen Ridong [this message]
2025-07-28 2:41 ` [PATCH 6.6 5/5] sched,freezer: Remove unnecessary warning in __thaw_task Chen Ridong
2025-07-28 3:11 ` [PATCH 6.6 0/5] [Backport] " Chen Ridong
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