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SubjectRe: + 28.7: network timeouts for r8169 and 8139too
On Sunday 10 May 2009 15:38:26 Michael Riepe wrote:
> Michael Buesch wrote:
> > I'm currently testing without any additional patches but
> > with the pci=nomsi boot option.
> >
> > I didn't notice any hickups, yet. I'm running a stresstest on a GBit link for quite
> > some time now. Earlier tests with older kernels and MSI burped earlier.
> >
> > I will do more testing. If it turns out this is stable I will test the same kernel
> > with Message Signaled Interrupts to see if that causes some breakage.
> I've had this problem up to and including Currently, I'm
> trying with pci=nomsi, and it's stable so far. With MSI
> enabled, a single high-speed TCP transfer will stop after a few seconds,
> but without MSI, I can run four simultaneous transfers to two different
> hosts without a single hickup.
> It seems to me that this particular chip really doesn't like MSI.

I can confirm this. I tried with msi enabled and it starts breaking
after a few seconds of heavy transfers. Disabling MSI results in a reliable connection.

Maybe we should disable MSI as temporary workaround for affected chips?

Greetings, Michael.

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