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SubjectRE: [git patches] net driver updates
FromKrishna Kumar2 <>
DateThu, 21 Feb 2008 11:32:08 +0530
Hi Divy,

But the race doesn't exist even for LLTX drivers these days. There is no
way two cpu's can execute the xmit handler at the same time.

Thanks,

- KK

> > > > The first part of the patch removes the !netif_queue_stopped(dev).
> > > > It opens the race discussed a while ago between Stephen hemminger> > and> > > > David Miller:> > > > http://marc.info/?l=linux-netdev&m=113383224512427&w=2> > >> > > I feel this race cannot happen anymore. I think the fix for that> race> > was> > > to introduce the> > > __LINK_STATE_QDISC_RUNNING bit thus eliminating any races between> > CPU's. If> > > one> > > CPU has called xmit, the other CPU will enqueue skbs (by holding the
> > > queue_lock) and> > > exit from qdisc_run since it finds the bit set already.> >> > And the race is talking about LLTX, which S2IO doesn't use as
> > far as I can tell.>> Dave,>> The driver is cxgb3 here, it uses LLTX.>> Cheers,> Divy



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