Re: [PATCH] VM fix for 2.4.0-test9 & OOM handler

[Rik van Riel <riel@conectiva.com.br>]

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On Mon, 9 Oct 2000, Ingo Molnar wrote:

> what do you think about the attached patch? It increases the effective
> priority of a (kernel-) killed process, and initiates a reschedule, so
> that it gets selected ASAP. (except if there are RT processes around.)
> This should make OOM decisions 'visible' much more quickly.

Note that the OOM killer already has this code built-in,
but it may be a good idea to have SIGKILL delivery speeded
up for every SIGKILL ...

regards,

Rik
--
"What you're running that piece of shit Gnome?!?!"
       -- Miguel de Icaza, UKUUG 2000

http://www.conectiva.com/		http://www.surriel.com/

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--- linux/kernel/signal.c.orig	Mon Oct  9 12:56:45 2000
+++ linux/kernel/signal.c	Mon Oct  9 13:00:20 2000
@@ -569,6 +569,14 @@
 		spin_unlock_irqrestore(&t->sigmask_lock, flags);
 		return -ESRCH;
 	}
+	/*
+	 * Special case, kernel is forcing SIGKILL.
+	 * Decrease signal delivery latency.
+	 */
+	if (sig == SIGKILL && (t->policy == SCHED_OTHER)) {
+		t->counter = MAX_COUNTER;
+		current->need_resched = 1;
+	}
 
 	if (t->sig->action[sig-1].sa.sa_handler == SIG_IGN)
 		t->sig->action[sig-1].sa.sa_handler = SIG_DFL;