netdev - Re: [PATCH] [NET]: Fix Ooops of napi net_rx

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Date:	Tue, 11 Dec 2007 15:42:22 -0800
From:	Stephen Hemminger <shemminger@...ux-foundation.org>
To:	"Joonwoo Park" <joonwpark81@...il.com>
Cc:	"Brandeburg, Jesse" <jesse.brandeburg@...el.com>,
	"David Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, herbert@...dor.apana.org.au,
	"Kok, Auke-jan H" <auke-jan.h.kok@...el.com>
Subject: Re: [PATCH] [NET]: Fix Ooops of napi net_rx_action.

Perhaps we should change the warning to identify the guilty device.


--- a/net/core/dev.c	2007-11-19 09:09:57.000000000 -0800
+++ b/net/core/dev.c	2007-12-07 15:54:03.000000000 -0800
@@ -2196,7 +2196,13 @@ static void net_rx_action(struct softirq
 		if (test_bit(NAPI_STATE_SCHED, &n->state))
 			work = n->poll(n, weight);
 
-		WARN_ON_ONCE(work > weight);
+		if (unlikely(work > weight)) {
+			if (net_ratelimit())
+				printk(KERN_WARNING
+				       "%s: driver poll bug (work=%d weight=%d)\n",
+				       work, weight);
+			work = weight;
+		}
 
 		budget -= work;
 

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