>>>>> "Andi" == Andi Kleen <ak@suse.de> writes:
Andi> Sounds like a bug -- the PPP driver is probably not
Andi> reentrant enough for that.
Andi> - -Andi
It seems that the ppp driver is subject to a similar phenomenon as
we are observing in the isdn driver:
The ppp channel calls ppp_output_wakeup() from interrupt, which in turn pulls
a new skb from the ppp xmit queue and passes it finally downstream via
ppp_send_frame(). All this occurs from interrupt context -- a fact which is
somewhat hidden in the code (naively, one would assume the same context as
in dev->hard_start_xmit()). Thus, any kfree_skb() in the lower xmit path
is potentially called from interrupt context.
Henner
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This archive was generated by hypermail 2b29 : Wed Mar 15 2000 - 21:00:14 EST