em network issues

[Kris Kennaway]

On Sat, Oct 21, 2006 at 09:32:50PM +0400, Gleb Smirnoff wrote:
> On Sat, Oct 21, 2006 at 12:57:52PM -0400, Kris Kennaway wrote:
> K> On Sat, Oct 21, 2006 at 10:17:06AM +0400, Gleb Smirnoff wrote:
> K> > On Thu, Oct 19, 2006 at 02:18:13PM -0700, Jack Vogel wrote:
> K> > J> The engineer in our test group has installed 6.2 BETA2 and attempted via a
> K> > J> number of tests to reproduce this problem, the machine even shares the em
> K> > J> interrupt with usb, and yet so far he has been unsuccessful.
> K> > 
> K> > I've failed to reproduce on a system where IRQ was shared between em(4)
> K> > and fxp(4). I've put traffic on both, but failed to reproduce. Probably
> K> > shared IRQ is required, but not sufficient.
> K> 
> K> Note what I've said a couple of times now...blasting packets out over
> K> the shared em doesn't trigger it for me either.  I can trigger it by
> K> fetching via FTP from a remote machine over the em.
> 
> I suppose the TCP_STREAM test from the netperf is the same as ftp
> fetch.

Maybe, but why not just try fetch? ;)

FYI, I still get timeouts from fetch on a shared em/fxp irq with
DEVICE_POLLING configured.  Turning on INTR_MPSAFE in the driver is
the only known "fix" so far for this condition.

Kris

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