Issue found in Armada 370: "No buffer space available" error during continuous ping

[Willy Tarreau]

Hi Maggie,

On Wed, Jul 16, 2014 at 10:37:47PM -0700, Maggie Mae Roxas wrote:
> Hi Thomas, Willy,
> Good day.
> 
> First of all, thanks again for looking further into this.
> 
> > Maggie, do you know if it is possible that for any reason your board
> > would not deliver an IRQ on Tx completion ? That could explain things.
>
> I'm sorrry but I'm not really sure how to check this - all I know is
> that the difference in the working and not-working setup (both
> software and hardware) is the mvneta.c.

In fact I don't know if you're running your own board or a "standard"
one (a mirabox or any NAS board). Because that could also be one of the
differences between what you observe on your side and our respective
experiences with our boards.

> > You can easily test reverting commit 4f3a4f701b just in case. If that's
> > the case, then the next step will be to figure out how it is possible
> > that IRQs are disabled!
> I'll try this one, specifcally this combination:
> - use 3.13.9 mvneta.c
> - apply cd71e246c16b30e3f396a85943d5f596202737ba
> - revert 4f3a4f701b59a3e4b5c8503ac3d905c0a326f922
> 
> I will update you the results within today until latest tomorrow.

OK fine, thank you!

Willy