Message-ID: <0E3FA95632D6D047BA649F95DAB60E57036627A6@exa-atlanta>
From: "Ju, Seokmann" <sju@lsil.com>
To: "'Sergio Chiesa'" <sergio.chiesa@eutelia.it>, linux-kernel@vger.kernel.org
Subject: RE: Followup: PROBLEM: Kernel bug at tg3.c:2456
Date: Mon, 4 Apr 2005 08:27:32 -0400 
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On Thursday, March 31, 2005 7:34 AM, Sergio wrote:
> I made some tests again, switching back to the onboard dual 
> aic7902 scsi 
> controller (non raid) the tg3 dont hung anymore.
> I just noticed the IRQ mappings change between the two settings.
> The Broadcom eth get always the IRQ #25, the two onboard scsi 
> controllers 
> get #24 and #25 (shared with the eth, is it harmful??) but 
> the megaraid 
> driver gets the IRQ #28
Can you please specify megaraid driver version?
It seems the megaraid driver gets unique IRQ and the IRQ dedicated to the
MegaRAID controller.
I don't see any problem concerning IRQ at this time. Difference of
performance in between MegaRAID and Adaptec can contribute the issue.

> Usually there
> are no messages on screen, but the last time I get "Kernel bug at
> tg3.c:2456"!! on the sender. The skb pointer in the tx_ring_info was
> null.... May it be queue overrun?
I would suggest to look into the issue from above perspective. 

Thank you.

Seokmann
LSI Logic Corporation.


> -----Original Message-----
> From: Sergio Chiesa [mailto:sergio.chiesa@eutelia.it] 
> Sent: Thursday, March 31, 2005 7:34 AM
> To: linux-kernel@vger.kernel.org
> Subject: Followup: PROBLEM: Kernel bug at tg3.c:2456
> 
> Sergio Chiesa wrote:
> 
> > 7.7.
> > Well, it seems that with the original onboard raid 
> controller the bug
> > didn't trigger... the controller was swapped with the lsi 
> logic by my
> > supplier because it fails badly with raid-5 arrays (hw/fw 
> related issue)
> > I also tried the original broadcom driver version 7.3.5 with similar
> > results...
> 
> I made some tests again, switching back to the onboard dual 
> aic7902 scsi 
> controller (non raid) the tg3 dont hung anymore.
> I just noticed the IRQ mappings change between the two settings.
> The Broadcom eth get always the IRQ #25, the two onboard scsi 
> controllers 
> get #24 and #25 (shared with the eth, is it harmful??) but 
> the megaraid 
> driver gets the IRQ #28
> 
> I think it is something IRQ related because if the eth hungs 
> but the kernel 
> is still running I see more than 140000 irq per second with "vmstat".
> 
> Hope it helps better!
> 
> Sergioc.
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