diff mbox

Kernel panic during stress with igb in the upstream kernel

Message ID 20090317100203.GA23396@gondor.apana.org.au
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Herbert Xu March 17, 2009, 10:02 a.m. UTC
On Tue, Mar 17, 2009 at 09:37:24AM +0000, Jarek Poplawski wrote:
>
> Probably I miss something, but you seem to assume here this skb will
> be taken by netpoll later. But if it's not active (trapped) vlan
> packet will be passed as "normal"?

Good point.  I'll see if this stuff can be simplified further,
but for now, let's go for the obvious fix.

gro: Fix vlan/netpoll check again

Jarek Poplawski pointed out that my previous fix is broken for
VLAN+netpoll as if netpoll is enabled we'd end up in the normal
receive path instead of the VLAN receive path.

This patch fixes it by calling the VLAN receive hook.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>


Thanks,

Comments

David Miller March 17, 2009, 8:11 p.m. UTC | #1
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Tue, 17 Mar 2009 18:02:03 +0800

> On Tue, Mar 17, 2009 at 09:37:24AM +0000, Jarek Poplawski wrote:
> >
> > Probably I miss something, but you seem to assume here this skb will
> > be taken by netpoll later. But if it's not active (trapped) vlan
> > packet will be passed as "normal"?
> 
> Good point.  I'll see if this stuff can be simplified further,
> but for now, let's go for the obvious fix.
> 
> gro: Fix vlan/netpoll check again
> 
> Jarek Poplawski pointed out that my previous fix is broken for
> VLAN+netpoll as if netpoll is enabled we'd end up in the normal
> receive path instead of the VLAN receive path.
> 
> This patch fixes it by calling the VLAN receive hook.
> 
> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Applied, thanks Herbert.
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diff mbox

Patch

diff --git a/net/8021q/vlan_core.c b/net/8021q/vlan_core.c
index 6227248..654e45f 100644
--- a/net/8021q/vlan_core.c
+++ b/net/8021q/vlan_core.c
@@ -79,9 +79,6 @@  static int vlan_gro_common(struct napi_struct *napi, struct vlan_group *grp,
 {
 	struct sk_buff *p;
 
-	if (netpoll_rx_on(skb))
-		return GRO_NORMAL;
-
 	if (skb_bond_should_drop(skb))
 		goto drop;
 
@@ -107,6 +104,9 @@  drop:
 int vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp,
 		     unsigned int vlan_tci, struct sk_buff *skb)
 {
+	if (netpoll_rx_on(skb))
+		return vlan_hwaccel_receive_skb(skb, grp, vlan_tci);
+
 	skb_gro_reset_offset(skb);
 
 	return napi_skb_finish(vlan_gro_common(napi, grp, vlan_tci, skb), skb);
@@ -121,6 +121,9 @@  int vlan_gro_frags(struct napi_struct *napi, struct vlan_group *grp,
 	if (!skb)
 		return NET_RX_DROP;
 
+	if (netpoll_rx_on(skb))
+		return vlan_hwaccel_receive_skb(skb, grp, vlan_tci);
+
 	return napi_frags_finish(napi, skb,
 				 vlan_gro_common(napi, grp, vlan_tci, skb));
 }