'no buffer space available' after switch goes down on freeBSD 7.3

[Hooman Fazaeli]

On 12/25/2012 4:31 AM, Ryan Stone wrote:
> I don't believe that this is fixed in later versions of the driver. The
> problem is that when the interface loses link the transmit queue can fill
> up. Once that happens the driver never gets any more calls from the network
> stack to make it send packets. Pinging the interface fixes it because the
> driver processes rx.and tx from the same context, so when it receives a
> packet it starts transmitting again.
>
> The patch that I sent fixes the problem by forcing the driver to process
> the tx queue when ever links goes from down to up.
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>

I have not tested it but it is apparently fixed:

http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/dev/e1000/if_em.c#rev1.21.2.23



-- 

Best regards.
Hooman Fazaeli