Re: [patch] voluntary-preempt-2.6.8.1-P8

[Ingo Molnar]

* Lee Revell <rlrevell@xxxxxxxxxxx> wrote:

> On Mon, 2004-08-23 at 17:01, Ingo Molnar wrote:
> > i've uploaded the -P8 patch:
> > 
> >   http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.8.1-P8
> > 
> > Changes since -P8:
> > 
> >  - fixes the DRI/DRM latency in radeon (and other drivers). The concept 
> >    was investigated/tested by Dave Airlie.
> > 
> >  - reduce netdev_max_backlog to 8 (Mark H Johnson)
> > 
> 
> Should this fix the 500+ usec latency I saw in rt_garbage_collect? 
> This one took a while to occur (overnight).

i dont think it will. Does the patch below help?

	Ingo

--- net/ipv4/route.c.orig
+++ net/ipv4/route.c
@@ -738,7 +738,7 @@ static int rt_garbage_collect(void)
 
 		if (atomic_read(&ipv4_dst_ops.entries) < ip_rt_max_size)
 			goto out;
-	} while (!in_softirq() && time_before_eq(jiffies, now));
+	} while (!in_softirq() && time_before_eq(jiffies, now) && !need_resched());
 
 	if (atomic_read(&ipv4_dst_ops.entries) < ip_rt_max_size)
 		goto out;
-
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