Tasks marked with PF_SUSPEND_TASK are involved in system suspend or hibernate operations. These tasks must not be frozen, as they are responsible for coordinating or executing parts of the suspend/resume sequence. This patch explicitly sets their freeze_priority to FREEZE_PRIORITY_NEVER during initialization. This makes their exemption from the freezer logic clear in the new freeze-priority model and avoids redundant evaluations during process traversal. Signed-off-by: Zihuan Zhang <zhangzihuan@xxxxxxxxxx> --- kernel/power/process.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/power/process.c b/kernel/power/process.c index 06eafdb32abb..21bbca7040cf 100644 --- a/kernel/power/process.c +++ b/kernel/power/process.c @@ -147,6 +147,7 @@ int freeze_processes(void) pm_wakeup_clear(0); pm_freezing = true; + freeze_set_default_priority(current, FREEZE_PRIORITY_NEVER); error = try_to_freeze_tasks(true); if (!error) __usermodehelper_set_disable_depth(UMH_DISABLED); @@ -218,6 +219,7 @@ void thaw_processes(void) WARN_ON(!(curr->flags & PF_SUSPEND_TASK)); curr->flags &= ~PF_SUSPEND_TASK; + freeze_set_default_priority(current, FREEZE_PRIORITY_NORMAL); usermodehelper_enable(); schedule(); -- 2.25.1
