[Xen-devel] netback commit history

["Jan Beulich" <JBeulich@xxxxxxxx>]

Hi Ian,

with the upstream netback introduction consisting of a single big commit
I wonder whether you could point me to where the full history of it is.

I'm asking particularly in the context of us being asked to add a safety
check similar to the vif->netbk != NULL one at the beginning of
xenvif_start_xmit() (also in xenvif_interrupt(), but there we have a
similar check in place), which hadn't been in the legacy tree (obviously)
nor in the original multiple-tasklets patch that I retained a copy of. That
is, I'd like to understand the reasons for this check as it seems wrong
to me to have to do it there - I'd rather think that if an interface got
disabled, execution shouldn't even reach that function anymore.

One thing I wonder about in this context is whether the
netif_stop_queue() call from xenvif_close() shouldn't happen before
xenvif_down() (not the least for reasons of symmetry with
xenvif_open()).

Thanks, Jan


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