[PATCH] coredump: speedup SIGKILL sending (281de339) · Commits · 戴 / test

fs/exec.c

+8 −1

Original line number	Original line	Diff line number	Diff line
	@@ -1371,17 +1371,24 @@ static void format_corename(char corename, const char pattern, long signr)
	static void zap_process(struct task_struct start, int ptraced)		static void zap_process(struct task_struct start, int ptraced)
	{		{
	struct task_struct *t;		struct task_struct *t;
			unsigned long flags;

			spin_lock_irqsave(&start->sighand->siglock, flags);

	t = start;		t = start;
	do {		do {
	if (t != current && t->mm) {		if (t != current && t->mm) {
	t->mm->core_waiters++;		t->mm->core_waiters++;
	force_sig_specific(SIGKILL, t);		sigaddset(&t->pending.signal, SIGKILL);
			signal_wake_up(t, 1);

	if (unlikely(t->ptrace) &&		if (unlikely(t->ptrace) &&
	unlikely(t->parent->mm == t->mm))		unlikely(t->parent->mm == t->mm))
	*ptraced = 1;		*ptraced = 1;
	}		}
	} while ((t = next_thread(t)) != start);		} while ((t = next_thread(t)) != start);

			spin_unlock_irqrestore(&start->sighand->siglock, flags);
	}		}

	static void zap_threads (struct mm_struct *mm)		static void zap_threads (struct mm_struct *mm)