On 08/11, Zihuan Zhang wrote: > > 在 2025/8/8 22:39, Oleg Nesterov 写道: > >On 08/07, Zihuan Zhang wrote: > >>--- 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); > >But why? > > > >Again, freeze_task() will return false anyway, this process is > >PF_SUSPEND_TASK. > > I think there is resaon put it here. For example, systemd-sleep is a > user-space process that executes the suspend flow. > > If we don’t set its freeze priority explicitly, our current code may end up > with this user process being the last one that cannot freeze. How so? sorry I don't follow. Oleg.
