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SubjectRe: Stalls on sync PPP transmission (new card)
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> Furthermore, I noticed that the first thing that is called after a "hang"
> is cpc_queue_xmit (i.e., the TX function to which the hard_start_xmit
> pointer in the device structure points to). My question is: what could
> cause this function not to be called immediately by the network subsystem
> as soon as TX data is available from the application? Since I could see

If the driver previously did a dev->tbusy = 0 without a mark_bh(NET_BH) it
may not wake the networking bh to feed data out. If the delays are
precisely one second see if they occur in 2.2.13pre14/5 as Alexey fixed
a traffic scheduling bug

>


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