On Wed, Oct 01, 2014 at 10:37:35AM -0700, Adrian Chadd wrote: > Hi, > > Try this on -HEAD. There were some recent fixes to ixgbe that haven't > been RFCed.
I don't have a way to test this on HEAD. Do you know if there is any change that could be related ? On 10.1 beta 3 I noticed is that when I open a single queue on an ixgbe (and with incoming traffic), the rx unit stalls no matter what the previous state of dev.ix.*.fc (i.e. the DROP_EN bits) or QDE are. In this state, toggling DROP_EN has no effect, whereas something that seems effective is setting the QDE bit(s) in the PFQDE register for all queues, _after_ i open the device. >From the above my take is the following: - on NIC reset, the SRRCTL register starts at 0 including DROP_EN; same goes for PFQDE.QDE - setting SRRCTL.DROP_EN must happen before the receive unit is started; - conversely, toggling PFQDE.QDE has effect even when the receive unit has started - sysctl dev.ix.*.fc sets/clear DROP_EN but at the wrong time (the right time seems to be the window between reset and start) I am going to run more tests to figure out. cheers luigi _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
