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Re: [Xen-devel] tg3 network stall in xen-3.4.x but not in xen-3.3.x

To: Teck Choon Giam <giamteckchoon@xxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] tg3 network stall in xen-3.4.x but not in xen-3.3.x
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Sat, 04 Jul 2009 07:41:55 +0100
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On 04/07/2009 07:32, "Teck Choon Giam" <giamteckchoon@xxxxxxxxx> wrote:

> Is there any netfront/netback changes between xen-3.3.x and xen-3.4.x
> which cause such issue?  Anybody experience such network stall in your
> tg3 in bridge network environment?

You are running exactly the same kernels on both 3.3 and 3.4? Then there can
be no netfront/back differences as you are running exactly the same drivers.

Certain things are on by default in 3.4 which were not in 3.3. One such
thing is MSI. You might try disabling CONFIG_PCI_MSI in your dom0 kernel
config. It'll be listed as "Message Signaled Interrupts (MSI and MSI-X)" in
the PCI section of the Linux config menus.

 -- Keir

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