linux-kernel - [RFC PATCH v1 4/9] freezer: Set default freeze priority for userspace tasks

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Message-Id: <20250807121418.139765-5-zhangzihuan@kylinos.cn>
Date: Thu,  7 Aug 2025 20:14:13 +0800
From: Zihuan Zhang <zhangzihuan@...inos.cn>
To: "Rafael J . Wysocki" <rafael@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Oleg Nesterov <oleg@...hat.com>,
	David Hildenbrand <david@...hat.com>,
	Michal Hocko <mhocko@...e.com>,
	Jonathan Corbet <corbet@....net>
Cc: Ingo Molnar <mingo@...hat.com>,
	Juri Lelli <juri.lelli@...hat.com>,
	Vincent Guittot <vincent.guittot@...aro.org>,
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	Ben Segall <bsegall@...gle.com>,
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	Al Viro <viro@...iv.linux.org.uk>,
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	linux-pm@...r.kernel.org,
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	Zihuan Zhang <zhangzihuan@...inos.cn>
Subject: [RFC PATCH v1 4/9] freezer: Set default freeze priority for userspace tasks

The freezer framework now supports per-task freeze priorities. To
ensure consistent behavior, this patch assigns a default freeze
priority (FREEZE_PRIORITY_NORMAL) to all newly created userspace tasks.

This helps maintain deterministic freezing order and prepares the
ground for future enhancements based on priority-aware freezing logic.

Kernel threads are not affected by this change, since they are excluded.

Signed-off-by: Zihuan Zhang <zhangzihuan@...inos.cn>
---
 kernel/fork.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/fork.c b/kernel/fork.c
index 9ce93fd20f82..04af5390af25 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -2422,6 +2422,7 @@ __latent_entropy struct task_struct *copy_process(
 
 	copy_oom_score_adj(clone_flags, p);
 
+	freeze_set_default_priority(p, FREEZE_PRIORITY_NORMAL);
 	return p;
 
 bad_fork_core_free:
-- 
2.25.1