From a585042f7b933539a0b6bc63650c2d49ffb2e55d Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Mon, 21 Nov 2011 12:32:23 -0800 Subject: freezer: remove racy clear_freeze_flag() and set PF_NOFREEZE on dead tasks clear_freeze_flag() in exit_mm() is racy. Freezing can start afterwards. Remove it. Skipping freezer for exiting task will be properly implemented later. Also, freezable() was testing exit_state directly to make system freezer ignore dead tasks. Let the exiting task set PF_NOFREEZE after entering TASK_DEAD instead. Signed-off-by: Tejun Heo Cc: Oleg Nesterov --- kernel/power/process.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'kernel/power/process.c') diff --git a/kernel/power/process.c b/kernel/power/process.c index fe2787207f00..23822dc14b6c 100644 --- a/kernel/power/process.c +++ b/kernel/power/process.c @@ -25,8 +25,7 @@ static inline int freezable(struct task_struct * p) { if ((p == current) || - (p->flags & PF_NOFREEZE) || - (p->exit_state != 0)) + (p->flags & PF_NOFREEZE)) return 0; return 1; } -- cgit v1.2.3-58-ga151