* Eric Dumazet <dada1@xxxxxxxxxxxxx> wrote:Yes, this error was corrected by Andi already :)
I noticed some paths in kernel are very stack aggressive, and on i386 with CONFIG_4KSTACKS we were really in a dangerous land, even without my patch.
What we call 4K stacks is in fact 4K - sizeof(struct task_struct), so a litle bit more than 2K. [...]
that's just wrong - 4K stacks on x86 are 4K-sizeof(thread_info) - the task struct is allocated elsewhere. The patch below runs just fine on 4K-stack x86.
Ingo
------------->
Subject: net: loopback speedup
From: Ingo Molnar <mingo@xxxxxxx>
Date: Mon Mar 31 11:23:21 CEST 2008
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
drivers/net/loopback.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
Index: linux/drivers/net/loopback.c
===================================================================
--- linux.orig/drivers/net/loopback.c
+++ linux/drivers/net/loopback.c
@@ -158,7 +158,7 @@ static int loopback_xmit(struct sk_buff lb_stats->bytes += skb->len;
lb_stats->packets++;
- netif_rx(skb);
+ netif_receive_skb(skb);
return 0;
}
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